By reducing the amplitude of a sound wave, its:

(a) pitch increases (b) loudness decreases

(c) loudness increases (d) pitch decreases.

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Solution

The loudness of sound is proportional to the square of the amplitude. So, by reducing the amplitude of the sound wave, its loudness decreases and the correct choice is (b).

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(a) The time period of a wave is 2 s. Its frequency is ___.

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(f) A tuning fork produces sound of ___ frequency.

Two sounds of same loudness and same pitch produced by the two different instruments differ in their:

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