Published In

Journal of the Acoustical Society of America

Document Type

Article

Publication Date

12-2007

Subjects

Pressure transducers, Noise -- Measurement, Underwater acoustics

Abstract

Ocean acoustic noise can be processed efficiently to extract Green's function information between two receivers. By using noise array-processing techniques, it has been demonstrated that a passive array can be used as a fathometer [Siderius, et al., J. Acoust. Soc. Am. 120, 1315-1323 (2006)]. Here, this approach is derived in both frequency and time domains and the output corresponds to the reflection sequence. From this reflection sequence, it is possible to extract seabed layering. In the ocean waveguide, most of the energy is horizontally propagating, whereas the bottom information is contained in the vertically propagating noise. Extracting the seabed information requires a dense array, since the resolution of the bottom layer is about half the array spacing. If velocity sensors are used instead of pressure sensors, the array spacing requirement can be relaxed and simulations show that just one vertical velocity sensor is sufficient.

Description

This is the publisher's final PDF. Copyright 2007 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. The following article appeared in J. Acoust. Soc. Am. 123, 1297 and may be found at: http://dx.doi.org/10.1121/1.2831930

DOI

10.1121/1.2831930

Persistent Identifier

http://archives.pdx.edu/ds/psu/12119

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