Question

Velocity of sound in air is 340 m/s. Sound waves of wavelength 0.01 m from a vibrating body reach your ear through air. Will you be able to hear the sound? Justify your answer.

Answer 1

Speed of the sound is,
$v=v\lambda$
$v=\frac{v}{\lambda }=\frac{340}{0.01}=34000Hz$
Our audible range is 20 Hz 20 kHz. The obtained frequency is above this value. Since the given sound wave belongs to the ultrasonic range, it is not audible.