A sound wave travels at a speed of 339 ms–1.
Question.
A sound wave travels at a speed of 339 ms–1. If its wavelength is 1.5 cm, what is the frequency of the wave? Will it be audible ?

Solution:

Speed of sound wave, $\mathrm{v}=339 \mathrm{~ms}^{-1}$;

Wavelength, $\lambda=1.5 \mathrm{~cm}=0.015 \mathrm{~m}$;

Frequency, $v=?$

Frequency, $v=\frac{v}{2}=\frac{339}{0}=22600 \mathrm{~Hz}$

The sound will not be audible, because human beings can hear only up to $20,000 \mathrm{~Hz}$.
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