Measuring acoustic backscattering strength of underwater target using high frequency sonar

A basic designing method of high frequency sonar transmitting-receiving system for measuring acoustic backscattering strength is developed. The method is experimentally examined using the laboratory and ocean data obtained by sonar instrument. The results show that the experimentally observed the backscattering of underwater target is different. Sand bottom has a highest backscattering than mud bottom, fish, and seagrass. Discrimination of fish, seagrass, and bottom type using sonar signal processing is possible.