Physical Acoustics and Special Projects Laboratory

The tank is 10 ft long by 10 ft wide by 6.8 ft deep. Two positioning arms, located above the tank and computer controlled by stepper motors, are used to mount and provide precise location of transducers and targets in the tank. The positioning arms also allow clockwise and counterclockwise rotations. Attached to the side of the tank is heater with feed-back circuitry. This heater allows for measurements to be made as a function of water temperature in a range from ambient to over 40 degrees Centigrade. The measurement process is all digital and precise data collection can be computer controlled. A frequency range of 20 kHz to 3 MHz is available. Instrumentation for acoustic measurements includes: numerous transducers, computers, functional signal generators, waveform recorders, spectrum analyzers and filters.