Characteristic & Classification of Sound
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Transcript of Characteristic & Classification of Sound
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GOVERNMENT ENGINEERING COLLEGE - BHARUCH014
E.C Div.:- A
PHYSICS 2110011
Classification and Characteristics of
sound
Nakrani Pratik R. 130140111046
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INDEX
What Is Sound
Classification Of Sound
Classification of Audible Sound
Properties Of Musical Sound
Properties Of Noise
Characteristics Of Musical SoundPitch Loudness Timbre
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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.
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CLASSIFICATION OF SOUND
Infrasound Audible Sound UltraSound
Frequency(f) Based
f < 20 Hz 20 Hz < f < 20 kHz f > 20 kHz
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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
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PROPERTIES OF MUSICAL SOUND
• Regular in Shape.• Have definite Periodicity.• They do not undergo a sudden change in
amplitude.
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• Irregular in Shape.
• Do not have Definite Periodicity.
• They Undergo a Sudden Change In Amplitude.
Properties Of Noise
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CHARACTERISTICS OF MUSICAL SOUND
PitchRelated To Frequency Of Sound
LoudnessRelated To Intensity Of Sound
TimbreRelated To Quality Of Sound
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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.
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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.
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LOUDNESS
• Loudness is Characteristics which is Common to all sound
• As we seen Loudness Is
Classified in two types.
Musical Sound
Noise
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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.
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TIMBRE
• Quality Of Sound Which Enables us to distinguish between two sounds having the same loudness & Pitch.
• Depends on the Presence of overtones.
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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
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Hope You Will Enjoy it………
THANKS FOR WATCHING