SW-2247 - ESAW Ultrasonic System 

Ultrasonic transmitter and receiver operating in 40 KHz region enclosed in separate plastic enclosures (142x80x43) mm approximately, which contain the electronic circuit and 9V, DC batteries. 2 Khz modulating frequency is transmitted by ultrasonic transmitter and detected by the receiver, which amplifies the signal and drives an internal loudspeaker. Output the signal can also be visualized on a CRO for more quantitive measurements via. 4mm color-coded sockets field on the receiver. Transmitter is supplied with two ultrasonic transducers, both can be switch ON simultaneously when required to produce two coherent sources. The interference pattern can be dramatically demonstrate and simplifying the Young's Slits experiment by using waves rather than light on moving the receiver along a line parallel to the sources. The system uses the sound waves above the hearing threshold and demonstrating the reflection properties linked with 'SONAR' etc.