Question
Mon December 24, 2012 By:
 

Why doesn't a vibrating pendulum produce sound?If it does then why don't we hear it?

Expert Reply
Tue December 25, 2012
A vibrating pendulum produces sound but we are not able to hear it because humans have a specific range of hearing that is 20Hz to 20000Hz, sound having a lower frequency than 20hz is not audible.
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