Question

In order to reduce the loudness of a sound we have to(a) decrease its frequency of vibration of the sound.(b) increase its frequency of vibration of the sound.(c) decrease its amplitude of vibration of the sound.(d) increase its amplitude of vibration of the sound.NCERT Class VIIIScience - Exemplar ProblemsChapter 13. Sound

Answer 1

In order to reduce the loudness of a particular sound that we have it is better to decrease its amplitude of the vibration of the sound.

Thus this is the correct answer.

The loudness of a particular sound can be measured in decibel units which expresses the relative intensity of the sound.

Answer 2

" $\bf{c}$ "

In order to reduce the loudness of a sound we have to decrease its$\textbf{Amplitute of vibration of the Sound}$.

Explanation :

Loudness of a sound which depends on the amplitude of the vibrating body producing the sound.