Noise At Work

Date 4th Dec 2017

Shaun Knott MIOA

Noisetaking the

ROCKETout of the

SCIENCE

Get a Consultant

- V -

Do It Yourself

Details

Shaun Knott Construction Specialist

Casella Measurement

Directive 200310EC

Published Feb 15th 2003

Revised October 2005

The Basics

The Best Excuse Ever

The Basics

The Basics

L A F MX

LAF MX LC pk

LAF MN LA eq (Leq)

L epd

L= Level ACZ= Weighting FSI = Speed The measurement

LCpk

Peak noise is the highest point measured and also has legislation as to its level

70

80

90

LA

TIME

So We Need

LAF MX

LAF MN

LA eq (Leq)

LC pk

L epd

Ln90

Ln50

Measurement from the meter

(steady) at normal operator

position

Measurement from the meter

highest noise level recorded

Calculated measurement

based on actual time

exposure from the LAeq

LAeq is the amount of noise we would be exposed to if we stayed in the same

area for 8 hours

It is not our actual exposure

However

We need LAeq to calculate our exposure

Some noise meters do not give LAeq and

therefore should not be used

When measuring we use the meter to give us

a Steady Measurement or if thatrsquos not possible

we measure one complete cycle

What is LAeq

Working out Leprsquod

Difference

between 2 dB

Values (dB)

Add to

Highest (dB)Hours

0 3 12 92 103

1 25 8 90 101

2 2 7 89 100

3 2 6 89 100

4 15 5 88 99

5 15 4 87 98

6 1 3 86 97

7 1 2 84 95

8 1 1 81 92

9 05 frac12 78 89

10 05 frac14 75 86

11 05

12 05

gt12 0

= 86 + 92

We take the difference between

the two (6) using the table look at

the amount to be added (1) and

add it to the higher

So

86 + 92 = 93 dBA

Decibel Addition Table

Difference between 2 dB

Values (dB)Add to Highest (dB)

0 3

1 25

2 2

3 2

4 15

5 15

6 1

7 1

8 1

9 05

10 05

11 05

12 05

gt12 0

What is Leprsquod

Leprsquod is the actual exposure based on time exposed

LAeq

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Get a Consultant

- V -

Do It Yourself

Details

Shaun Knott Construction Specialist

Casella Measurement

Directive 200310EC

Published Feb 15th 2003

Revised October 2005

The Basics

The Best Excuse Ever

The Basics

The Basics

L A F MX

LAF MX LC pk

LAF MN LA eq (Leq)

L epd

L= Level ACZ= Weighting FSI = Speed The measurement

LCpk

Peak noise is the highest point measured and also has legislation as to its level

70

80

90

LA

TIME

So We Need

LAF MX

LAF MN

LA eq (Leq)

LC pk

L epd

Ln90

Ln50

Measurement from the meter

(steady) at normal operator

position

Measurement from the meter

highest noise level recorded

Calculated measurement

based on actual time

exposure from the LAeq

LAeq is the amount of noise we would be exposed to if we stayed in the same

area for 8 hours

It is not our actual exposure

However

We need LAeq to calculate our exposure

Some noise meters do not give LAeq and

therefore should not be used

When measuring we use the meter to give us

a Steady Measurement or if thatrsquos not possible

we measure one complete cycle

What is LAeq

Working out Leprsquod

Difference

between 2 dB

Values (dB)

Add to

Highest (dB)Hours

0 3 12 92 103

1 25 8 90 101

2 2 7 89 100

3 2 6 89 100

4 15 5 88 99

5 15 4 87 98

6 1 3 86 97

7 1 2 84 95

8 1 1 81 92

9 05 frac12 78 89

10 05 frac14 75 86

11 05

12 05

gt12 0

= 86 + 92

We take the difference between

the two (6) using the table look at

the amount to be added (1) and

add it to the higher

So

86 + 92 = 93 dBA

Decibel Addition Table

Difference between 2 dB

Values (dB)Add to Highest (dB)

0 3

1 25

2 2

3 2

4 15

5 15

6 1

7 1

8 1

9 05

10 05

11 05

12 05

gt12 0

What is Leprsquod

Leprsquod is the actual exposure based on time exposed

LAeq

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Details

Shaun Knott Construction Specialist

Casella Measurement

Directive 200310EC

Published Feb 15th 2003

Revised October 2005

The Basics

The Best Excuse Ever

The Basics

The Basics

L A F MX

LAF MX LC pk

LAF MN LA eq (Leq)

L epd

L= Level ACZ= Weighting FSI = Speed The measurement

LCpk

Peak noise is the highest point measured and also has legislation as to its level

70

80

90

LA

TIME

So We Need

LAF MX

LAF MN

LA eq (Leq)

LC pk

L epd

Ln90

Ln50

Measurement from the meter

(steady) at normal operator

position

Measurement from the meter

highest noise level recorded

Calculated measurement

based on actual time

exposure from the LAeq

LAeq is the amount of noise we would be exposed to if we stayed in the same

area for 8 hours

It is not our actual exposure

However

We need LAeq to calculate our exposure

Some noise meters do not give LAeq and

therefore should not be used

When measuring we use the meter to give us

a Steady Measurement or if thatrsquos not possible

we measure one complete cycle

What is LAeq

Working out Leprsquod

Difference

between 2 dB

Values (dB)

Add to

Highest (dB)Hours

0 3 12 92 103

1 25 8 90 101

2 2 7 89 100

3 2 6 89 100

4 15 5 88 99

5 15 4 87 98

6 1 3 86 97

7 1 2 84 95

8 1 1 81 92

9 05 frac12 78 89

10 05 frac14 75 86

11 05

12 05

gt12 0

= 86 + 92

We take the difference between

the two (6) using the table look at

the amount to be added (1) and

add it to the higher

So

86 + 92 = 93 dBA

Decibel Addition Table

Difference between 2 dB

Values (dB)Add to Highest (dB)

0 3

1 25

2 2

3 2

4 15

5 15

6 1

7 1

8 1

9 05

10 05

11 05

12 05

gt12 0

What is Leprsquod

Leprsquod is the actual exposure based on time exposed

LAeq

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

The Basics

The Best Excuse Ever

The Basics

The Basics

L A F MX

LAF MX LC pk

LAF MN LA eq (Leq)

L epd

L= Level ACZ= Weighting FSI = Speed The measurement

LCpk

Peak noise is the highest point measured and also has legislation as to its level

70

80

90

LA

TIME

So We Need

LAF MX

LAF MN

LA eq (Leq)

LC pk

L epd

Ln90

Ln50

Measurement from the meter

(steady) at normal operator

position

Measurement from the meter

highest noise level recorded

Calculated measurement

based on actual time

exposure from the LAeq

LAeq is the amount of noise we would be exposed to if we stayed in the same

area for 8 hours

It is not our actual exposure

However

We need LAeq to calculate our exposure

Some noise meters do not give LAeq and

therefore should not be used

When measuring we use the meter to give us

a Steady Measurement or if thatrsquos not possible

we measure one complete cycle

What is LAeq

Working out Leprsquod

Difference

between 2 dB

Values (dB)

Add to

Highest (dB)Hours

0 3 12 92 103

1 25 8 90 101

2 2 7 89 100

3 2 6 89 100

4 15 5 88 99

5 15 4 87 98

6 1 3 86 97

7 1 2 84 95

8 1 1 81 92

9 05 frac12 78 89

10 05 frac14 75 86

11 05

12 05

gt12 0

= 86 + 92

We take the difference between

the two (6) using the table look at

the amount to be added (1) and

add it to the higher

So

86 + 92 = 93 dBA

Decibel Addition Table

Difference between 2 dB

Values (dB)Add to Highest (dB)

0 3

1 25

2 2

3 2

4 15

5 15

6 1

7 1

8 1

9 05

10 05

11 05

12 05

gt12 0

What is Leprsquod

Leprsquod is the actual exposure based on time exposed

LAeq

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

The Best Excuse Ever

The Basics

The Basics

L A F MX

LAF MX LC pk

LAF MN LA eq (Leq)

L epd

L= Level ACZ= Weighting FSI = Speed The measurement

LCpk

Peak noise is the highest point measured and also has legislation as to its level

70

80

90

LA

TIME

So We Need

LAF MX

LAF MN

LA eq (Leq)

LC pk

L epd

Ln90

Ln50

Measurement from the meter

(steady) at normal operator

position

Measurement from the meter

highest noise level recorded

Calculated measurement

based on actual time

exposure from the LAeq

LAeq is the amount of noise we would be exposed to if we stayed in the same

area for 8 hours

It is not our actual exposure

However

We need LAeq to calculate our exposure

Some noise meters do not give LAeq and

therefore should not be used

When measuring we use the meter to give us

a Steady Measurement or if thatrsquos not possible

we measure one complete cycle

What is LAeq

Working out Leprsquod

Difference

between 2 dB

Values (dB)

Add to

Highest (dB)Hours

0 3 12 92 103

1 25 8 90 101

2 2 7 89 100

3 2 6 89 100

4 15 5 88 99

5 15 4 87 98

6 1 3 86 97

7 1 2 84 95

8 1 1 81 92

9 05 frac12 78 89

10 05 frac14 75 86

11 05

12 05

gt12 0

= 86 + 92

We take the difference between

the two (6) using the table look at

the amount to be added (1) and

add it to the higher

So

86 + 92 = 93 dBA

Decibel Addition Table

Difference between 2 dB

Values (dB)Add to Highest (dB)

0 3

1 25

2 2

3 2

4 15

5 15

6 1

7 1

8 1

9 05

10 05

11 05

12 05

gt12 0

What is Leprsquod

Leprsquod is the actual exposure based on time exposed

LAeq

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

The Basics

The Basics

L A F MX

LAF MX LC pk

LAF MN LA eq (Leq)

L epd

L= Level ACZ= Weighting FSI = Speed The measurement

LCpk

Peak noise is the highest point measured and also has legislation as to its level

70

80

90

LA

TIME

So We Need

LAF MX

LAF MN

LA eq (Leq)

LC pk

L epd

Ln90

Ln50

Measurement from the meter

(steady) at normal operator

position

Measurement from the meter

highest noise level recorded

Calculated measurement

based on actual time

exposure from the LAeq

LAeq is the amount of noise we would be exposed to if we stayed in the same

area for 8 hours

It is not our actual exposure

However

We need LAeq to calculate our exposure

Some noise meters do not give LAeq and

therefore should not be used

When measuring we use the meter to give us

a Steady Measurement or if thatrsquos not possible

we measure one complete cycle

What is LAeq

Working out Leprsquod

Difference

between 2 dB

Values (dB)

Add to

Highest (dB)Hours

0 3 12 92 103

1 25 8 90 101

2 2 7 89 100

3 2 6 89 100

4 15 5 88 99

5 15 4 87 98

6 1 3 86 97

7 1 2 84 95

8 1 1 81 92

9 05 frac12 78 89

10 05 frac14 75 86

11 05

12 05

gt12 0

= 86 + 92

We take the difference between

the two (6) using the table look at

the amount to be added (1) and

add it to the higher

So

86 + 92 = 93 dBA

Decibel Addition Table

Difference between 2 dB

Values (dB)Add to Highest (dB)

0 3

1 25

2 2

3 2

4 15

5 15

6 1

7 1

8 1

9 05

10 05

11 05

12 05

gt12 0

What is Leprsquod

Leprsquod is the actual exposure based on time exposed

LAeq

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

The Basics

L A F MX

LAF MX LC pk

LAF MN LA eq (Leq)

L epd

L= Level ACZ= Weighting FSI = Speed The measurement

LCpk

Peak noise is the highest point measured and also has legislation as to its level

70

80

90

LA

TIME

So We Need

LAF MX

LAF MN

LA eq (Leq)

LC pk

L epd

Ln90

Ln50

Measurement from the meter

(steady) at normal operator

position

Measurement from the meter

highest noise level recorded

Calculated measurement

based on actual time

exposure from the LAeq

LAeq is the amount of noise we would be exposed to if we stayed in the same

area for 8 hours

It is not our actual exposure

However

We need LAeq to calculate our exposure

Some noise meters do not give LAeq and

therefore should not be used

When measuring we use the meter to give us

a Steady Measurement or if thatrsquos not possible

we measure one complete cycle

What is LAeq

Working out Leprsquod

Difference

between 2 dB

Values (dB)

Add to

Highest (dB)Hours

0 3 12 92 103

1 25 8 90 101

2 2 7 89 100

3 2 6 89 100

4 15 5 88 99

5 15 4 87 98

6 1 3 86 97

7 1 2 84 95

8 1 1 81 92

9 05 frac12 78 89

10 05 frac14 75 86

11 05

12 05

gt12 0

= 86 + 92

We take the difference between

the two (6) using the table look at

the amount to be added (1) and

add it to the higher

So

86 + 92 = 93 dBA

Decibel Addition Table

Difference between 2 dB

Values (dB)Add to Highest (dB)

0 3

1 25

2 2

3 2

4 15

5 15

6 1

7 1

8 1

9 05

10 05

11 05

12 05

gt12 0

What is Leprsquod

Leprsquod is the actual exposure based on time exposed

LAeq

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

LCpk

Peak noise is the highest point measured and also has legislation as to its level

70

80

90

LA

TIME

So We Need

LAF MX

LAF MN

LA eq (Leq)

LC pk

L epd

Ln90

Ln50

Measurement from the meter

(steady) at normal operator

position

Measurement from the meter

highest noise level recorded

Calculated measurement

based on actual time

exposure from the LAeq

LAeq is the amount of noise we would be exposed to if we stayed in the same

area for 8 hours

It is not our actual exposure

However

We need LAeq to calculate our exposure

Some noise meters do not give LAeq and

therefore should not be used

When measuring we use the meter to give us

a Steady Measurement or if thatrsquos not possible

we measure one complete cycle

What is LAeq

Working out Leprsquod

Difference

between 2 dB

Values (dB)

Add to

Highest (dB)Hours

0 3 12 92 103

1 25 8 90 101

2 2 7 89 100

3 2 6 89 100

4 15 5 88 99

5 15 4 87 98

6 1 3 86 97

7 1 2 84 95

8 1 1 81 92

9 05 frac12 78 89

10 05 frac14 75 86

11 05

12 05

gt12 0

= 86 + 92

We take the difference between

the two (6) using the table look at

the amount to be added (1) and

add it to the higher

So

86 + 92 = 93 dBA

Decibel Addition Table

Difference between 2 dB

Values (dB)Add to Highest (dB)

0 3

1 25

2 2

3 2

4 15

5 15

6 1

7 1

8 1

9 05

10 05

11 05

12 05

gt12 0

What is Leprsquod

Leprsquod is the actual exposure based on time exposed

LAeq

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

So We Need

LAF MX

LAF MN

LA eq (Leq)

LC pk

L epd

Ln90

Ln50

Measurement from the meter

(steady) at normal operator

position

Measurement from the meter

highest noise level recorded

Calculated measurement

based on actual time

exposure from the LAeq

LAeq is the amount of noise we would be exposed to if we stayed in the same

area for 8 hours

It is not our actual exposure

However

We need LAeq to calculate our exposure

Some noise meters do not give LAeq and

therefore should not be used

When measuring we use the meter to give us

a Steady Measurement or if thatrsquos not possible

we measure one complete cycle

What is LAeq

Working out Leprsquod

Difference

between 2 dB

Values (dB)

Add to

Highest (dB)Hours

0 3 12 92 103

1 25 8 90 101

2 2 7 89 100

3 2 6 89 100

4 15 5 88 99

5 15 4 87 98

6 1 3 86 97

7 1 2 84 95

8 1 1 81 92

9 05 frac12 78 89

10 05 frac14 75 86

11 05

12 05

gt12 0

= 86 + 92

We take the difference between

the two (6) using the table look at

the amount to be added (1) and

add it to the higher

So

86 + 92 = 93 dBA

Decibel Addition Table

Difference between 2 dB

Values (dB)Add to Highest (dB)

0 3

1 25

2 2

3 2

4 15

5 15

6 1

7 1

8 1

9 05

10 05

11 05

12 05

gt12 0

What is Leprsquod

Leprsquod is the actual exposure based on time exposed

LAeq

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

LAeq is the amount of noise we would be exposed to if we stayed in the same

area for 8 hours

It is not our actual exposure

However

We need LAeq to calculate our exposure

Some noise meters do not give LAeq and

therefore should not be used

When measuring we use the meter to give us

a Steady Measurement or if thatrsquos not possible

we measure one complete cycle

What is LAeq

Working out Leprsquod

Difference

between 2 dB

Values (dB)

Add to

Highest (dB)Hours

0 3 12 92 103

1 25 8 90 101

2 2 7 89 100

3 2 6 89 100

4 15 5 88 99

5 15 4 87 98

6 1 3 86 97

7 1 2 84 95

8 1 1 81 92

9 05 frac12 78 89

10 05 frac14 75 86

11 05

12 05

gt12 0

= 86 + 92

We take the difference between

the two (6) using the table look at

the amount to be added (1) and

add it to the higher

So

86 + 92 = 93 dBA

Decibel Addition Table

Difference between 2 dB

Values (dB)Add to Highest (dB)

0 3

1 25

2 2

3 2

4 15

5 15

6 1

7 1

8 1

9 05

10 05

11 05

12 05

gt12 0

What is Leprsquod

Leprsquod is the actual exposure based on time exposed

LAeq

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Working out Leprsquod

Difference

between 2 dB

Values (dB)

Add to

Highest (dB)Hours

0 3 12 92 103

1 25 8 90 101

2 2 7 89 100

3 2 6 89 100

4 15 5 88 99

5 15 4 87 98

6 1 3 86 97

7 1 2 84 95

8 1 1 81 92

9 05 frac12 78 89

10 05 frac14 75 86

11 05

12 05

gt12 0

= 86 + 92

We take the difference between

the two (6) using the table look at

the amount to be added (1) and

add it to the higher

So

86 + 92 = 93 dBA

Decibel Addition Table

Difference between 2 dB

Values (dB)Add to Highest (dB)

0 3

1 25

2 2

3 2

4 15

5 15

6 1

7 1

8 1

9 05

10 05

11 05

12 05

gt12 0

What is Leprsquod

Leprsquod is the actual exposure based on time exposed

LAeq

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Decibel Addition Table

Difference between 2 dB

Values (dB)Add to Highest (dB)

0 3

1 25

2 2

3 2

4 15

5 15

6 1

7 1

8 1

9 05

10 05

11 05

12 05

gt12 0

What is Leprsquod

Leprsquod is the actual exposure based on time exposed

LAeq

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

What is Leprsquod

Leprsquod is the actual exposure based on time exposed

LAeq

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Below Lower Action

Employer must

bull Reduce risks to lowest practicable level

bull Keep records and make them available including audiometry (if done)

bull Buy quiet

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Below Lower Action

bull 80dB(A) LEPd

bull 112 Pascals (LCPK= 135dB)

bull Take action as in regulations

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Above Lower Action

bull Identify all employees at risk

bull Put up signs

bull Review if any changes to noise levels

bull Repeat assessment lt2 years

bull Inform employees of risk

bull Provide choice of PPE on request (first aid)

bull Provide training education

bull Noise Control

Employer must

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Upper Exposure Action

bull 85dB LEPd

bull 140 Pascals (LCPK= 137dB)

bull Take action as in regulations

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Above Upper Action

bull Demarcate as Noise Hazard Zones

bull PPE must be used at all times

bull Noise control to reduce exposure

bull If Lepd is over 95dBA then must use octave band

method to check if hearing protection is effective

Note For peak action level take the same action as

for second action level

EMPLOYER MUSThellip

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Exposure Limit Value

bull 87dB(A) LEPd exposure limit

bull 140dB LCPK exposure limit (200 Pascals)

bull Is the maximum permissible estimated operator noise dose

whilst wearing (and not wearing) hearing protection

bull Value at the ear after taking into account any PPE

bull Therefore necessary to calculate effectiveness of PPE

bull NOT a target but minimum acceptable

bull Target these individuals first

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Audiometry

bull Employees over the second action

level have the right to a hearing

check (audiometric test)

bull As a preventative measure

individuals who may be

susceptible to noise below this

level should also be tested eg

those with previous damage

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Hearing Protection

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

The Basics

A bit about

the

Ear amp Hearing

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

What do we need to measure for correct hearing protection

bull Octave band method

ndash Needs frequency analyser 315Hz - 8KHz

bull HML Method

ndash Needs C and A weighted LEQ

bull SNR Method

ndash Needs an A or a C weighted LEQ

bull Octave band is the preferred method

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

3M Disposable Ear Plugs

PNR = M-(H-M) 4 x (LC - LA - 2)

OR

PNR = M-(H-M) 8 x (LC - LA - 2)

LAeq Octaversquos less

octave attenuation

LAeq or LCeq - SNR

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Noise ndash v ndash Health and Safety

85 dB A (Leprsquod) - (87 dB A (Leprsquod))70 dB A (Leprsquod)

Health amp Safety Noise

Somewhere in here after protection

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Narrowing Down Available Options

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

OR

Lets Just Make It

Quieter

Engineered Noise Reduction

Lets Just Make It

Quieter

Engineered Noise Reduction

Engineered Noise Reduction

Implications

bull Cost

bull New assessment

bull Review PPE

bull Increase noise control

bull Action plan

bull Time

A quick word ldquoThe Environmentrdquo

bull Section 61 Notices and section 60 Notices PPG24

bull Dealing with the Local Authorities

bull Compliance and conformance

bull Noise Dust No Vibration etc etc etc

bull The right equipment doing the work for you

Questions

Questions

Contact Details

Shaun Knott01234 844100

07730 818267

A quick word ldquoThe Environmentrdquo

bull Section 61 Notices and section 60 Notices PPG24

bull Dealing with the Local Authorities

bull Compliance and conformance

bull Noise Dust No Vibration etc etc etc

bull The right equipment doing the work for you

Questions

Questions

Contact Details

Shaun Knott01234 844100

07730 818267

Questions

Questions

Contact Details

Shaun Knott01234 844100

07730 818267

Contact Details

Shaun Knott01234 844100

07730 818267