Partitioning of a seabed acoustic image into discrete physical entities or classes
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Acoustic seabed classification is the partitioning of a seabed acoustic image into discrete physical entities or classes. This is a particularly active area of development in the field of seabed mapping, marine geophysics, underwater acoustics and benthic habitat mapping. Seabed classification is one route to characterizing the seabed and its habitats. Seabed characterization makes the link between the classified regions and the seabed physical, geological, chemical or biological properties. Acoustic seabed classification is possible using a wide range of acoustic imaging systems including multibeam echosounders, sidescan sonar, single-beam echosounders, interferometric systems and sub-bottom profilers. Seabed classification based on acoustic properties can be divided into two main categories; surficial seabed classification and sub-surface seabed classification. Sub-surface imaging technologies use lower frequency sound to provide higher penetration, whereas surficial imaging technologies provide higher resolution imagery by utilizing higher frequencies (especially in shallow water).
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Acousticseabedclassification is the partitioning of a seabedacoustic image into discrete physical entities or classes. This is a particularly active...
sections through a feature. Oceans portal Acousticseabedclassification – Partitioning of a seabedacoustic image into discrete physical entities or classes...
An acoustic doppler current profiler (ADCP) is a hydroacoustic current meter similar to a sonar, used to measure water current velocities over a depth...
map the seabed. It emits acoustic waves in a fan shape beneath its transceiver. The time it takes for the sound waves to reflect off the seabed and return...
map the seabed, ships use acoustic technology to map water depths throughout the world. Submersible vehicles help researchers study unique seabed ecosystems...
attenuated when they travel through the seabed. Sound sources used include airguns, vibroseis and explosives. Acoustic sensors can be used to monitor the sound...
Ocean acoustic tomography is a technique used to measure temperatures and currents over large regions of the ocean. On ocean basin scales, this technique...
of the deep isothermal layer and thus has some seasonal variance. Other acoustic ducts exist, particularly in the upper mixed layer, but the ray paths lose...
research and practical application topics using acoustical devices as sensors in aquatic environments. Acoustical techniques can be applied to sensing aquatic...
equipment and systems for non-destructive, acoustic remote sensing of the seabed to assist with seabedclassification and environmental monitoring. In 1994...
active sonar, echo sounding is the transmission of an acoustic pulse directly downwards to the seabed, measuring the time between transmission and echo return...
Acoustic tags are small sound-emitting devices that allow the detection and/or remote tracking of organisms in aquatic ecosystems. Acoustic tags are commonly...
of a beach Acousticseabedclassification – The partitioning of a seabedacoustic image into discrete physical entities or classes Acoustical oceanography...
recently, the acoustic data collected has been valuable in underwater habitat assessment and classification for the variables; seabed type (e.g. rock...
Seabed mining, also known as Seafloor mining is the recovery of minerals from the seabed by techniques of underwater mining. The concept includes mining...
and tuna can hold a higher core temperature. Many fish can communicate acoustically with each other, such as during courtship displays. The earliest fish...
area was informed by the United States Navy's (USN) sonar detection of an acoustic signature consistent with an implosion around the time communications with...
underwater acoustic positioning system is a system for the tracking and navigation of underwater vehicles or divers by means of acoustic distance and/or...
A seabed tractor is a type of remotely operated underwater vehicle. They can be used for submarine cable laying or burial of cables or pipelines. This...
Underwater acoustic communication is a technique of sending and receiving messages in water. There are several ways of employing such communication but...
hybrid radio/acoustic modem. In comparing wireless technologies subsea radio waves prefer shallow water and can cross the air/water/seabed boundaries easily...
and seabed; biological surveys; and for both acoustic and trawl fisheries surveys. It can trawl to 4,000 metres (13,000 ft) and conduct acoustic soundings...
marine, subsea or offshore pipeline) is a pipeline that is laid on the seabed or below it inside a trench. In some cases, the pipeline is mostly on-land...
Timothy G.; White, Paul R. (1 March 2008). "3D high-resolution acoustic imaging of the sub-seabed". Applied Acoustics. 69 (3): 262–271. doi:10.1016/j.apacoust...
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