Question

# A sound wave is travelling in air at a speed of 343 m/s. The wavelength of the sound wave is 0.1 cm. Find the frequency of the sound wave. Is the sound audible to humans?Yes, 20000 HzNo, 20000 HzYes, 343000 Hz No, 343000 Hz

Solution

## The correct option is D No, 343000 Hz Speed of the sound = 343 m/s We know that, speed = frequency × wavelength Wavelength = 0.001 m Thus, frequency = speedwavelength = 343000 Hz As the frequency of the sound is beyond 20,000 Hz, it is beyond the audible range of humans. Hence, the sound is inaudible to humans.

Suggest corrections