Waves > sound

This kinesthetic experience reinforces understanding of the interference pattern that results from two coherent sources producing circular waves. Compare this with a similar ripple tank experiment.

waste pipe is used to illustrate interference of sound waves coming from a single source by two different paths. By identifying nodes and antinodes, you can find the speed of sound.

A microphone shows the standing wave pattern in the space between a loudspeaker and an acoustically ‘hard’ reflective wall.

This experiment demonstrates vividly how sound waves make air vibrate in a tube.