Which of the following parameters determines the loudness of sound ?

Frequency

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Amplitude

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Wavelength

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Speed

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Solution

The correct option is B Amplitude
Loudness is the measure of the intensity of sound waves. The intensity of a sound wave is proportional to its amplitude ( $I \propto A^{2}$ ). Hence the loudness of a sound depends on its amplitude.

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Similar questions

(a) Which of the following quantity determines the loudness of a sound wave ?

(i) wavelength, (ii) frequency, and (c) amplitude.

(b) How is loudness related to the quantity mentioned above in part (a) ?

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