(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.

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Solution

(a) Loudness is the physiological response of our ears to sound. It depends on amplitude and frequency and also the age of the person. Human beings can hear the sound of frequency between 20 Hz to 20,000 Hz.
(b) (a) , (b) diagrams are given below respectively

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