Other methods of Sound

In these methods the time dimension has been replaced by a measurement of the inverse of time (frequency).

Kundt's tube is an example of an testing which can be used to measure the speed of sound in a small volume. It has the advantage of being able to assess the speed of sound in any gas. This method uses a powder to make the nodes and antinodes able to be seen to the human eye. This is an example of a compressed experimental setup.

A tuning fork can be held near the mouth of a long pipe which is plunging into a barrel of water. In this system it is the case that the tube can be brought to resonance if the length of the air column in the pipe is equal to ({1+2n}λ/4) where n is an integer. As the antinodal point for the tube at the open end is slightly outside the mouth of the pipe it is best to find two or more points of quality and then measure half a wavelength between these.

Here it is the case that v = fλ.