Generates the 40kHz signal which is fed to the transducer cell and also to 4mm sockets on the rear panel of the unit. This latter facility enables a second transducer to be driven simultaneously, providing an in-phase double point source for interference experiments, etc. Facilities are also provided for modulating the output of the transmitter using an audio signal generator or audio amplifier/microphone combination. By this method the transmission of speech or other audio information is possible over a distance in excess of 100m.
Dimensions: case 150 x 95 x 60mm, horn 75 x 100mm mouth diam. x length.
Requires PP9 9V battery (not supplied).