The Environmental Acoustics of Two Alaskan Rivers and its Relation to Salmon Counting Sonars
Abstract
During the summer of 1999, the Applied Physics Laboratory worked with the Alaska Department of Fish and Game, Biosonics Inc., and Hydroacoustics Technology Inc. to make underwater environmental acoustic measurements in Alaska's Kenai and Wood rivers. The goal of these measurements was to understand, and model, the sources and magnitude of background acoustic reverberation, defined as the average acoustic intensity versus time (range) in the absence of any scattering from fish. The background reverberation determines, in part, the minimum size class of fish detectable and the accuracy of fish-tracking and counting algorithms that exploit the complex phase of the fish echo. It is also necessary to establish rigorous detection probabilities for all fish size classes. This report summarizes the results and analysis of these measurements and presents environmental acoustic models that can be used to evaluate signal-processing and fish-tracking algorithms.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2000
- Accession Number
- ADA382035
Entities
People
- Deborah A. Hart
- Harold J. Geiger
- James J. Dawson
- Peter Hans Dahl
- Sam V. Johnston
Organizations
- University of Washington