We have learnt that vibration

Question:

We have learnt that vibration is necessary for producing sound. Explain why the sound produced by every vibrating body cannot be heard by us.

Solution:

Since, range of frequency for every vibrating body is different. But we can hear the vibrations which lies between the range of frequencies from 20

Hz to 20000 Hz, so sound of every vibrating body cannot be heard by us.

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