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Q.

The loudness of sound is measured in which of the following units?

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a

Centimetre

b

Joule

c

Newton 

d

Decibels

answer is C.

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Detailed Solution

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  • The loudness of sound is measured in decibels(dB).
  • The amplitude of the sound is the maximum height of the sound wave above the axis. 
  • Amplitude determines the loudness of the sound. 
  • We know that loudness is directly proportional to the square of the amplitude of the sound. So, if the amplitude of the sound wave is large, the sound is loud. 
     
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