Q36 of 123 Page 253

What is the loudness of a normal conversation in decibels ?

The Normal conversation is at 60 dB


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34

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

(a) doubled?


(b) halved?

 35

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

 37

On what factor does the pitch of a sound depend?

 38

How is pitch related to frequency?