A sound wave travels at a speed of 339 m s-1. If its wavelength is 1.5 cm, what is the frequency of the wave? Will it be audible?
Given,
Speed of sound, v = 339 m s-1
Frequency, f =?
Wavelength, λ = 1.5 cm
= 
= 0.015 m
We know that,
v = f × λ
339 = f × 0.015
f = 
= 22600 Hz
As the frequency is 22600 Hz, that is beyond the upper limit of hearing. Hence, it will not be audible. It is actually ultrasonic sound.
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