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[66]
Is it true that the loudness of sound increases if the amplitude of a wave is tripled?

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a

True

b

False

answer is A.

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Detailed Solution

The above statement is True.
Once the wave's amplitude is tripled, the loudness will increase ninefold. It is because loudness depends on the sq. of the wave's amplitude.
That is Loudness ∝ (Amplitude)2.
Amplitude refers to the greatest displacement or distance a point on a vibrating body or wave can move relative to its equilibrium location. It is equivalent to the vibration path's half-length.
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