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


We need a vibrating body for the production of sound. But we cannot hear the sound of all vibrating bodies.

Range of frequency for every vibrating body is different.


The sounds of frequencies less than about 20 vibrations per second cannot be heard by us. Such sounds are called inaudible sounds.


The sounds of frequencies higher than about 20,000 vibrations per second are also cannot be heard by us.


The range of frequency which is audible to us is 20 Hz – 20,000 Hz. This range is called audible range.


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