Question

Why does a vibrating simple pen.dulam not produce any sound

Answer 1

If something vibrates at a frequency of or in between 20Hz to 20KHz, we can hear it otherwise we can't. because our ear can hear only this frequency range. OK, now according to this question the oscillation of pendulum is lees than the 20Hz(e.i. ... that's why we can't hear the sound of pendulum oscillation.

Answer 2

HEY DEAR_____
HERE IS YOUR ANSWER_____

^_^
First, let's define frequency. It is no of vibrations produced per sec.

Humans can hear only sound of those material whose frequency is 20Hz to 20000Hz. If the frequency of the body is less or greater than this human ears are unable to perceive sound.

So if the frequency of pendulum is less or greater than this range you cannot hear the sound produced by it.

HOPE IT WILL HELP YOU____
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