Frequency range of the audible sounds is
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(b) The human ear responds to sounds with frequencies in the range from $20 \mathrm{Hz}$ to $20000 \mathrm{Hz}$. This is called the audible range of the human ear.
Thus, the frequency range of audible sound is $20 \mathrm{H} z$ to $20000 \mathrm{Hz}$.
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