Question

which factor remain constant while propagation of sound wave through the given medium?

Answer 1

Frequency of sound wave - this depends only on the source of the sound wave !
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Answer 2

The frequency of a sound wave remains constant during its propagation through a given medium.

• The velocity of sound waves depends on the medium and temperature of the surroundings.

• According to the Laplace Formula, V = $\sqrt{\rho RT/M}$

• The speed of any wave = v = λν (Here λ= wavelength and ν is the frequency of the wave).
• λ and v change depending on the medium but ν of a wave depends only on its source.
• Hence the quotient v/λ is always constant for a wave.