Sonars which form high resolution images operate at high frequencies where the acoustic wavelengths are short compared to the target dimensions and the waves are scattered predominately from the geometric target boundary. In the structural acoustic regime where acoustic wavelengths are comparable to the target dimensions, sound penetrates the target and the scattered echoes are related to the vibrational dynamics of the object. The time-frequency features in the echoes can ...
This project is exploring the development of a structural acoustics (SA) based sonar methodology for wide area search and identification of underwater unexploded ordnance (UXO). This approach has significant advantages over conventional acoustic approaches relying on formation of high resolution images including: diverse set of fingerprints leading to low false alarm rates; longer range leading to wide area coverage; and low frequency sediment penetration leading to buried target prosecution. A ...
Reports by Author
