Question

why does a vibrating simple pendlum 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

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 less than 20Hz that's why we can't hear the sound of pendulum oscillation.