Abstract by Gabriel Fronk
Physics and Astronomy
Frequency-dependant characterization of an underwater acoustic measurement tank
A laboratory water tank is used to model a shallow ocean environment for underwater acoustic research. To ensure that the tank is a reliable model of the ocean certain acoustic properties must be characterized. Reverberation time (RT) as a function of frequency is one such property. RT is an indicator of how long the echoes of a signal persist in an environment. Because the walls and bottom of the tank are close, we expect the tank to have a high RT. We are able to characterize the frequency-dependent RT of our tank using impulse-like signals. With this knowledge, we can choose appropriate absorptive material to reduce the RT for frequencies of interest.