Question

Sound waves of wavelength 1 cm have a velocity of 340 m/s in air. What is their frequency? Can this sound be heard by the human ear?

Answer 1

Given: 

wave length (λ) = 1 cm = 1/100 

Velocity of sound (v) = 340 m/s 

To fInd : 

frequency (u) = ? 

Formulae: 

ν = \(\upsilon\) λ 

Solution:

The frequency of the sound waves is 34000 Hz. The frequency is higher than 20000 Hz and therefore, this sound cannot be heard by the human ear.