Question

state the effect on the -1 loudness of a sound when the amplitude of the vibrating body increases
2 pitch of a sound when the frequency of the vibrating body increases

Answer 1

Since

loudness is directly proportional to the square of amplitude,

thus on increasing amplitude, a more loud sound is heard ( the loudness increases).

pitch is directly proportional to frequency ,

and on increasing frequency , a shriller sound is heard.