School of Physics Lecture Demonstration Manual

Wc-2 Interference of Two Sound Sources (1)

Published: Tuesday 14 March 2006 - Updated: Wednesday 30 March 2011


To demonstrate acoustic interference.



Click on pictures to enlarge.

Two Speaker Interference Diagram


The signal generator is fed into the auxiliary input of the stereo amplifier and set to 3-5 kHz. The speakers are positioned approximately six feet apart and directed into the audience. If the microphone probe is traversed along line A-B the nodes and antinodes are readily displayed as minima and maxima on the C.R.O.

Safety notes

Electrical safety 


top of page