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

V = 340 m/s 

λ = 0.01 m 

v = u λ 

f = V/λ 

f = 340/0.01 

= 34000 Hz > 20,000 Hz 

Human beings cannot hear these sounds. 

Audible frequency range is 20 Hz to 20000 Hz