Loudness of sound is proportional to ____________ .

its amplitude

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its frequency

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square of its amplitude

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square of its frequency

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Solution

The correct option is C square of its amplitude
Loudness of sound is proportional to square of its amplitude. Louder the sound, greater is the amplitude.

$L o u d n e s s \propto (a m p l i t u d e)^{2}$

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Loudness of a sound is directly proportional to the square of:

(a) What is meant by the 'loudness' of sound ? On what factor does the loudness of a sound depend ?

(b) Draw labelled diagrams to represent (a) soft sound, and (b) loud sound, of the same frequency.

The loudness of a sound is a factor of

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