Question

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

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

Answer 1

The correct option is D Temperature of the medium

The velocity of sound is given by,

$v=\sqrt{\frac{\gamma RT}{M}}$

where $\gamma$ 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 $\left(d\right)$ is correct.