Sponsor
Support for this work from the Office of Naval Research Ocean Acoustics Program is gratefully acknowledged.
Published In
Journal of the Acoustical Society of America Express Letters
Document Type
Article
Publication Date
12-2011
Subjects
Underwater acoustics, Noise, Acoustical engineering
Abstract
Recent work has shown that endfire beamforming of ocean noise can be used to produce images of the seabed layering [Siderius et al., J. Acoust. Soc. Am. 120, 1315–1323 (2006)]. This initial noise imaging technique used conventional beamforming and was later extended to adaptive beamforming that is theoretically optimal. However, there can be problems with adaptive methods, which include extreme sensitivity to random errors, the required averaging time, and computational complexity. Here, the concept of supergain is used to show that delay and sum beamforming can produce nearly the same results as the optimal adaptive methods without the drawbacks.
DOI
10.1121/1.3663282
Persistent Identifier
http://archives.pdx.edu/ds/psu/12073
Citation Details
Siderius, M. (2012). Using practical supergain for passive imaging with noise. The Journal of The Acoustical Society of America, 131(1), EL14-EL20.
Description
This is the publisher's final PDF. Copyright 2011 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. 131 (1) and may be found at: http://dx.doi.org/10.1121/1.3663282