Q35 of 123 Page 253

Name the unit used to measure the loudness of sound. Also write its symbol.

Decibel is the unit used to measure the loudness of sound. Its symbol is dB


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33

How does loudness depend on the amplitude of vibrations?

 34

By how much will the loudness of a sound change when the amplitude of vibrations is:

(a) doubled?


(b) halved?

 36

What is the loudness of a normal conversation in decibels ?

 37

On what factor does the pitch of a sound depend?