Acoustic Resonance Classification of Swimbladder-Bearing Fish
Abstract
To understand and exploit the resonance scattering by swimbladder-bearing fish (typically in the 1-10 kHz frequency region). Exploitation of the resonances can significantly reduce ambiguities in interpreting acoustic scattering in terms of meaningful biological parameters compared with traditional higher frequency approaches. To conduct a new class of quantitative acoustic studies of scattering by swimbladder-bearing fish utilizing new commercial broadband-acoustic technology that is optimized for use in the resonance scattering region of fish. This research is taking advantage of a commercial system that was originally designed for marine geological and gas/oil exploration. It is especially attractive for use in studying swimbladder-bearing fish because this system was optimized for use in the frequency band in which swimbladders typically resonate. The off-the-shelf sensors on the system (in particular, the transmitters and receivers) were selected and configured in a manner best suited for the fish application. The system is being used for studying distributions of fish in their natural habitat. The research is part of a NOAA/NMFS fisheries study and includes trawling for ground truthing and traditional high frequency echo sounders for comparison. Data are being interpreted in terms of physics-based scattering models whose parameters may be determined empirically as a result of the measurements. Tim Stanton oversees the entire program and is involved in every aspect. Dezhang Chu participated in finalizing system specifications, conducting the system calibration, participating in the at-sea study, and processing the data. Mike Jech conducts the biological sampling, performs high frequency acoustic surveys, and is involved in the design and execution of the cruises.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2006
- Accession Number
- ADA521752
Entities
People
- Dezhang Chu
- J. Michael Jech
- Timothy K. Stanton
Organizations
- Woods Hole Oceanographic Institution