Thread: Sound propagating

Sound propagating through air at 30oC passes through a vertical cold front into air that is 4.0oC. If the sound has a frequency of 2400 Hz, by what percentage does its wavelength change in crossing the boundary?

Originally Posted by babygirl

Sound propagating through air at 30oC passes through a vertical cold front into air that is 4.0oC. If the sound has a frequency of 2400 Hz, by what percentage does its wavelength change in crossing the boundary?

The speed of sound changes from 349.4 m/s to 333.8 m/s. The frequencies
on both sides of the front are equal, so as:



the wavelengths are:



So the percentage change in wavelength is:



RonL