Passive Bottom Reflection-Loss Estimation Using Ship Noise and a Vertical Line Array

Authors

Lanfranco Muzi, Portland State UniversityFollow
Martin Siderius, Portland State UniversityFollow
Christopher M. Verlinden, University of California - San Diego

Sponsor

Office of Naval Research Ocean Acoustics under Multidisciplinary University Research Initiative

Published In

Journal of the Acoustical Society of America

Document Type

Article

Publication Date

6-2017

Subjects

Underwater acoustics -- Technique, Sound waves, Beamforming, SIgnal processing, Acoustic localization

Abstract

An existing technique for passive bottom-loss estimation from natural marine surface noise (generated by waves and wind) is adapted to use noise generated by ships. The original approach—based on beamforming of the noise field recorded by a vertical line array of hydrophones—is retained; however, additional processing is needed in order for the field generated by a passing ship to show features that are similar to those of the natural surface-noise field. A necessary requisite is that the ship position, relative to the array, varies over as wide a range of steering angles as possible, ideally passing directly over the array to ensure coverage of the steepest angles. The methodology is illustrated through simulation and applied to data from a field experiment conducted offshore of San Diego, CA in 2009.

Description

Copyright 2017 Acoustical Society of America.

DOI

10.1121/1.4985122

Persistent Identifier

http://archives.pdx.edu/ds/psu/20592

Citation Details

Muzi, L., Siderius, M., & Verlinden, C. M. (2017). Passive bottom reflection-loss estimation using ship noise and a vertical line array. The Journal of the Acoustical Society of America, 141(6), 4372-4379.