RE: Why can we hear in the frequency range 20 Hz to 20 KHz only

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Why can we hear in the frequency range 20 Hz to 20 KHz only

in health •  7 years ago 

Hey i am upvoting your post...would you do the same? Cheers. https://steemit.com/fun/@nabilamk/2q7pva-test-yourself

health
7 years ago by

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