Adaptive passive fathometer processing

作者：Siderius Martin^*; Song Heechun; Gerstoft Peter; Hodgkiss William S; Hursky Paul; Harrison Chris

来源：Journal of the Acoustical Society of America, 2010, 127(4): 2193-2200.

DOI：10.1121/1.3303985

• acoustic signal processing
• array signal processing
• bathymetry
• sonar
• underwater sound

Recently, a technique has been developed to image seabed layers using the ocean ambient noise field as the sound source. This so called passive fathometer technique exploits the naturally occurring acoustic sounds generated on the sea-surface, primarily from breaking waves. The method is based on the cross-correlation of noise from the ocean surface with its echo from the seabed, which recovers travel times to significant seabed reflectors. To limit averaging time and make this practical, beamforming is used with a vertical array of hydrophones to reduce interference from horizontally propagating noise. The initial development used conventional beamforming, but significant improvements have been realized using adaptive techniques. In this paper, adaptive methods for this process are described and applied to several data sets to demonstrate improvements possible as compared to conventional processing.

• 出版日期2010-4