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Target strength distributions of Pacific sardine schools: Model results at 500 Hz to 10 kHz
Schools of fish can cause interference for long-range active sonars. The degree of interference depends heavily on the target strengths of the schools. However, there are few measurements and limited modeling of school target strengths in the frequency ranges of these sonars. During the summers of 2...
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Published in: | The Journal of the Acoustical Society of America 2016-12, Vol.140 (6), p.4456-4471 |
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Main Authors: | , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Schools of fish can cause interference for long-range active sonars. The degree of
interference depends heavily on the target strengths of the schools. However, there are
few measurements
and limited modeling of school target strengths in the frequency ranges of these
sonars. During the summers of 2009 through 2013, a comprehensive set of measurements of the
characteristics of Pacific sardine schools was collected off the west coast of the United
States. This data set has enabled model estimates of the target strength distributions
of these schools to be made at frequencies between 500 Hz and 10 kHz. This paper describes
the sardine school data, its use in the modeling, the modeling procedures, and
the target strength distributions obtained. The analysis indicates that, given the rates at which high
target strengths occurred at all frequencies of interest, Pacific sardine schools could be
a significant source of interference for long-range active sonars operating in
their vicinity. |
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ISSN: | 0001-4966 1520-8524 |
DOI: | 10.1121/1.4966553 |