Hydroacoustics
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2008-05-27T16:46:17Z
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{{Expand|date=March 2007}}
<!-- [[Image:SoftwareEchoscape.jpg|thumb|right|250px|Screensave of active hydroacoustics detecting fish.]] image deleted on commons -->
'''Hydroacoustics''' is a general term for the study and application of sound in water. The term comes from Greek υδρο, water, and ακουστική, acoustics. [[Hydroacoustics]], utilizing [[SONAR]] technology, is most commonly used for detection, assessment, and monitoring of underwater physical and biological characteristics.
Hydroacoustics can be utilized to detect the depth of a water body ([[bathymetry]]), as well as the presence or absence, abundance, distribution, size, and behavior of underwater plants and animals. Hydroacoustic sensing involves "[[passive acoustics]]" (listening for sounds) or ''[[active acoustics]]'' making a sound and listening for the echo, hence the common name for the device, [[echo sounder]] or [[echosounder]].
== Related Publications ==
* [http://www.htisonar.com/Pubs/HydroacousticEscapement.pdf Summary of the use of hydroacoustics for quantifying the escapement of adult salmonids (Oncorhynchus and Salmo spp.) in rivers.] Ransom, B.H., S.V. Johnston, and T.W. Steig. 1998. Presented at International Symposium and Workshop on Management and Ecology of River Fisheries, University of Hull, England, 30 March-3 April 1998
* [http://www.htisonar.com/Pubs/PlanktonAssesment.pdf Multi-frequency acoustic assessment of fisheries and plankton resources.] Torkelson,T.C., T.C. Austin, and P.H. Weibe. 1998. Presented at the 135th Meeting of the Acoustical Society of America and the 16th Meeting of the International Congress of Acoustics, Seattle, Washington.
== References ==
* [http://afs.allenpress.com/perlserv/?request=get-abstract&doi=10.1577%2FM04-186.1 Evaluation of Methods to Estimate Lake Herring Spawner Abundance in Lake Superior]
* [http://afs.allenpress.com/perlserv/?request=get-abstract&doi=10.1577%2FM05-040.1 Estimating Sockeye Salmon Smolt Flux and Abundance with Side-Looking Sonar]
* [http://www.gma.org/herring/research/acoustics/default.asp Herring Research: Using Acoustics to Count Fish.]
* [http://www.biosonicsinc.com/matrix_nodes.cfm Hydroacoustic Applications in Lake, River and Marine environments for study of plankton, fish, vegetation, substrate or seabed classification, and bathymetry.]
* [http://www.stateofthesalmon.org/SFPH_p4.pdf Hydroacoustics: Rivers] (in: Salmonid Field Protocols Handbook: Chapter 4)
* [http://www.stateofthesalmon.org/SFPH_p5.pdf Hydroacoustics: Lakes and Reservoirs] (in: Salmonid Field Protocols Handbook: Chapter 5)
* [http://www.htisonar.com/frame_241A.htm Key Benefits of Using Hydroacoustic Portable Split-Beam Systems]
* PAMGUARD: An Open-Source Software Community Developing Marine Mammal Acoustic Detection and Localisation Software to Benefit the Marine Environment; http://www.pamguard.org/home.shtml
[[Category:Ichthyology]]
[[ru:Гидроакустика]]