Q12 of 33 Page 174

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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