Question

Describe an activity to demonstrate the effect of frequency on pitch of sound?

Why we cannot hear any sound when the bob of simple pendulum starts oscillating?





plz answer it ​

Answer 1

Answer:

Sound is heard only if the body vibrates with a frequency of at least 20 Hz. Frequency of vibration of the pendulum is less than 20 Hz. Hence no sound is heard when the pendulum vibrates or oscillates in air.

Answer 2

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The higher the frequency of the sound, the greater will be the pitch of the sound. A high pitched sound is called a shrill sound while a low pitched sound is called a deep sound. Therefore, an object vibrating with high frequency produces a high frequency sound wave, that is, it produces a shrill or high pitched sound.