School of Physics Lecture Demonstration Manual

Wc-5 Quink's Interference

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


To demonstrate interference of sound.



Click on pictures to enlarge.

Quink's Interference Diagram


A horn loudspeaker feeds into a two path network of pipes which reunite after traveling different paths. It is suggested that the signal generator be set to 1000Hz and the pipe A be raised till a minimum sound intensity is obtained. If now the isolating valve is closed a maximum signal is displayed on the C.R.O.

Safety notes

Electrical safety 


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