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This PPt Contain Characteristic & Classification of Sound coverd under Physics Subject Of Engineering.....
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GOVERNMENT ENGINEERING COLLEGE - BHARUCH014
E.C Div.:- A
PHYSICS 2110011
Classification and Characteristics of
sound
Nakrani Pratik R. 130140111046
INDEX
What Is Sound
Classification Of Sound
Classification of Audible Sound
Properties Of Musical Sound
Properties Of Noise
Characteristics Of Musical SoundPitch Loudness Timbre
WHAT IS SOUND??
• Sound is a Vibration In an Elastic Medium With definite Frequency & Intensity…
• Longitudinal wave .• requires a medium .• cannot travel in a vacuum.
CLASSIFICATION OF SOUND
Infrasound Audible Sound UltraSound
Frequency(f) Based
f < 20 Hz 20 Hz < f < 20 kHz f > 20 kHz
CLASSIFICATION OF AUDIBLE SOUND
Musical• The Sound Which Produces
Pleasing Effect On The ear is Called Musical Sound.
• Sounds Of Sitar, Violin,Flute
Noise• The sound That Produces a jarring
effect on the ear and unpleasant to hear is called noise.
• Sound Of Road Traffic, Crackers,Aeroplane
PROPERTIES OF MUSICAL SOUND
• Regular in Shape.• Have definite Periodicity.• They do not undergo a sudden change in
amplitude.
• Irregular in Shape.
• Do not have Definite Periodicity.
• They Undergo a Sudden Change In Amplitude.
Properties Of Noise
CHARACTERISTICS OF MUSICAL SOUND
PitchRelated To Frequency Of Sound
LoudnessRelated To Intensity Of Sound
TimbreRelated To Quality Of Sound
PITCH
• We can describe pitch by frequency.
• Rapid vibrations of the sound source (high frequency) produce sound of a high pitch.
• Slow vibrations (low frequency) produce a low pitch.
• Different musical notes are obtained by changing the frequency of the vibrating sound source.
PITCH
• This is usually done by altering the size, the tightness, or the mass of the vibrating object.
• High-pitched sounds used in music are most often less than 4000 Hz, but the average human ear can hear sounds with frequencies up to 18,000 Hz.
LOUDNESS
• Loudness is Characteristics which is Common to all sound
• As we seen Loudness Is
Classified in two types.
Musical Sound
Noise
LOUDNESS
• Loudness & Intensity are Releted to each other by relation
Weber-Fechner law
L log IL = K log I
Where K Is Constant
From The Above Equation…
𝑑𝐿𝑑𝐼
=¿𝐾𝐼 𝑑𝐿
𝑑𝐼=𝑆𝑒𝑛𝑠𝑖𝑡𝑖𝑣𝑒𝑛𝑒𝑠𝑠𝑂𝑓 𝐸𝑎𝑟
Therefore, Loudness is physiological Quantity.
TIMBRE
• Quality Of Sound Which Enables us to distinguish between two sounds having the same loudness & Pitch.
• Depends on the Presence of overtones.
TIMBRE
• It helps Us To Distinguish musical notes emitted by different musical instruments & Voices Of different Person Even Though the Sound have Same
Pitch &
Loudness
Hope You Will Enjoy it………
THANKS FOR WATCHING