Q5 of 25 Page 73

In order to reduce the loudness of a sound we have to

The loudness of a sound depends upon the amplitude of vibration. Hence, in order to reduce the loudness of a sound, we have to decrease its amplitude of vibration. Lesser the amplitude, lesser will be the sound produced.

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3

Which of the following statements are correct?

(i) Sound is produced by vibrations.


(ii) Sound requires a medium for propagation.


(iii) Light and sound both require a medium for propagation.


(iv) Sound travels slower than light.

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An object is vibrating at 50 hertz. What is its time period?

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Loudness of sound is measured in units of

 7

The loudness of sound is determined by the