School of Physics Lecture Demonstration Manual

Wc-3 Ultrasonic Interference

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

Aim

To demonstrate interference of two sound sources.

Apparatus

Diagrams

Click on pictures to enlarge.

Ultarsonic Interference Diagram

Description

Two ultrasonic transducers are connected to a signal generator set to their resonant frequency of 26kHz. A third transducer is connected to a C.R.O. and placed perpendicular to the line joining the transmitters. As the receiver is moved along this line, maxima and minima are displayed on the C.R.O.

Safety notes

Electrical safety 

Maintenance 

top of page