Performance of a low-frequency, multi-resonant broadband Tonpilz transducer.
The underwater performance of a high-power multi-resonant Tonpilz transducer with a nearly flat frequency response and a power handling capability of 2 kW (peak) is reported here. A maximum transmitting voltage response (TVR) value of 156 dB re: 1 microPa/V at 1 m has been achieved at 3 kHz with a specially designed matching coil. A maximum receiving sensitivity (RS) of -164 dB re: 1 V/microPa at 3 kHz has been measured without using a matching coil. The horizontal half-power beam width of the transducer at 4 kHz is 101 degrees with a directivity index of 4 dB. This transmitter can be used for oceanographic applications such as subbottom profiling as well as long-range underwater communication.
Rajapan
Dhilsha
D
Tests and Measurements Laboratory, Marine Instrumentation, National Institute of Ocean Technology Campus, Chennai, Tamilnadu, India.