Ans. EFFECT OF AMPLITUDE ON LOUDNESS
The loadness of the sound varies directly with the amplitude of the vibrating body Examples
1. The sound produced by a sitar will be loud if we pluck its wires more violently.
2. When we beat a drum forcefully, the amplitude of its membrane increases and we hear a loud sound.
EFFECT OF FREQUENCY ON PITCH
A higher frequency means a higher pitch and'vice versa (Fig. 11.5).
For example, the frequency of the voice of ladies and children is higher than that of men. Therefore, the voice of ladies and children is shrill and of high pitch.