Question

If the frequency of a sound wave is 990 Hz, calculate its wavelength. (Assume the air temperature is 0°C.)

Answer 1

The speed of sound at 0°C is approximately v=331.2 m/s. The frequency of the sound wave is f=990 Hz. To find the wavelength of the wave, we can use the basic relationship between frequency, wavelength and speed of a wave:
$\lambda= \frac{v}{f}$
where $\lambda$ is the wavelength. If we use the data of the problem, we find
$\lambda= \frac{331.2 m/s}{990 Hz} =0.33 m$