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Sunday, May 3, 2020

Quality of Sound and Harmonics

Quality of Sound
Definition : Quality of sound is one of the characteristics of sound which plays a key role to help us distinguish between the sound produced by two different musical instruments although their pitch and loudness may be same . It enables us to distinguish between the sound produced by two different sources . This characteristic of sound is known as Quality of Sound.
The frequencies and loudness of two sounds may be same , but still it can be distinguished with the help of quality of sound.

Harmonics : 
Most of the bodies vibrates in a very complex manner and these bodies consists of different frequencies say 2 , 3 , 4 etc. in addition to the fundamental frequency . These additional tones of these bodies is known as Overtones or Harmonics .
Definition : The sound waves having frequency which is positive integer multiple of the fundamental frequency (frequency of original wave) is simply known as harmonics of that sound. 
Harmonics are responsible for the Quality of Sound.

Determination of Quality of Sound :-
A complex vibration is composed of a number of component simple tones .
According to a scientist named Helmholtz , the quality of sound depends on the number , relative frequencies and intensities of these conponent simple tones .
This is the reason why the quality of sounds produced by different sound sources is different , and therefore we can easily recognize the sounds of Violin and Harmonium or at of the other musical instruments.





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