Turn Up The Sound By PresenterMedia.comPresenterMedia.com
Slide 2
Our Goals for this Lesson To understand what causes the volume
of a sound To know how amplitude effects sound To see how sound
absorption plays a role in eliminating sound pollution. Goal #1
Goal #2 Goal #3 Goal #4 To learn how to decrease noise
pollution
Slide 3
Volume- describes how loud or soft a sound is. Intensity- a
measure of the amount of energy in a sound wave Decibel- the
special unit used to measure sound intensity or volume. Noise
Pollution- the occurrence of loud or unpleasant sound in the
environment VOCABULARY
Slide 4
When you are changing the volume or loudness of your T.V., you
are also changing the intensity of the sound or measure of the
amount of energy in the sound wave. Recall that amplitude is the
characteristic of sound that effects its loudness and softness. The
higher the amplitude the louder the sound. Turn Up the Sound
Slide 5
Each time a sound jumps up 10 dB it increases by a factor of
10. Of course what causes a sound to be disrupting to you depends
on other factors. Example: Rustling Newspaper at 30 dB might be
more disruptive if you are studying than a sudden burst of thunder
at 110 dB. A sound of 120 dB is loud enough to cause pain in your
ears. Measuring Sound Volume
Slide 6
When measuring volume, we use a unit called decibel or dB.
Below is a list of sources of sound. The higher the intensity or
decibel (dB) the louder the sound. Measuring Sound Volume
Slide 7
Noise pollution is the occurrence of loud or unpleasant sound
in the environment. An understanding of the properties of sound can
help you reduce noise pollution. Like light, sound is absorbed my
some materials and reflects off of others. Materials that are hard
such as concrete or brick reflects most of the sound that reaches
them. Noise Pollution
Slide 8
You saw in our experiment that some materials were better
absorbers of sound that others. Materials that are soft, such as
cloth, plastic foam, and plaster, absorbs much of the sound that
reaches them. In many buildings, such sound absorbers are built
right in. Noise Pollution
Slide 9
Question: Mr. Mostov wants to reduce the noise of loud students
in his classroom. What kind of floor or wall coverings should he
use to help absorb some of the sound? Exit Slip Question Write this
on scrap piece of paper you collected at the begging of class.
