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Why do we hear the sound produced by the humming bees while the sound of vibrations of pendulum is not heard?

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asked Oct 16, 2017 in Physics by jisu zahaan (28,760 points) ● 26 ● 374 ● 806

Why do we hear the sound produced by the humming bees while the sound of vibrations of pendulum is not heard?

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answered Oct 16, 2017 by sforrest072 (157,439 points) ● 60 ● 409 ● 933

Humming bees produce sound by vibrating their wings which is in the audible range. In case of pendulum the frequency is below 20 Hz which does not come in the audible range.

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