Evaluation of a rubber-compound diaphragm for acoustic fisheries surveys: Effects on dual-beam signal intensity and beam patterns
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Abstract
The use of rubber-compound windows for fisheries acoustics must consider operating frequency and ambient water temperatures. Signal attenuation by the rubber becomes pronounced with increased frequency and decreased temperature. Based on our results, a 420 k Hz system could be expected to lose up to 3-4 dB in colder water through a 5.1-cm thick rubber diaphragm. At 120 k Hz, signal loss was negligible and would undoubtedly also be inconsequential for even lower frequencies used in fisheries applications (e.g., 70, 38 k Hz).
Suggested Citation
Fleischer, G.W., Argyle, R., Nester, R., Dawson, J., 2002, Evaluation of a rubber-compound diaphragm for acoustic fisheries surveys: Effects on dual-beam signal intensity and beam patterns: Journal of Sound and Vibration, v. 258, no. 4, p. 763-772, https://doi.org/10.1006/jsvi.2002.5139.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Evaluation of a rubber-compound diaphragm for acoustic fisheries surveys: Effects on dual-beam signal intensity and beam patterns |
| Series title | Journal of Sound and Vibration |
| DOI | 10.1006/jsvi.2002.5139 |
| Volume | 258 |
| Issue | 4 |
| Year Published | 2002 |
| Language | English |
| Publisher | Elsevier |
| Contributing office(s) | Great Lakes Science Center |
| Description | 10 p. |
| First page | 763 |
| Last page | 772 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |