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Question

Which of the following quantities related to a sound wave affect the velocity of sound in a gaseous medium?

A
Amplitude
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B
Frequency
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C
Phase Angle
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D
Temperature of the medium
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Solution

The correct option is D Temperature of the medium
The velocity of sound is given by,

v=γRTM

where γ is the adiabatic index, R is universal gas constant, T is absolute temperature and M is molecular mass of the gas.

So, speed of sound in a gaseous medium is independent of amplitude, frequency and phase angle of the sound wave and depends on the temperature of the medium.

Hence, option (d) is correct.

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