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This feature is referred to as bottom-track. The process has two parts; first identify the position of the bottom from the acoustic echo, then calculating the velocity from a window centered around the bottom position. When an ADCP is mounted on a moving ship, the bottom track velocity may be subtracted from the measured water velocity.
At the UK National Bat Conference, Wildlife Acoustics announced the Echo Meter handheld bat detector. [8] The device will be available in December 2011. The detector is capable of monitoring for bats using heterodyne, frequency division or Real Time Expansion (RTE). RTE is Wildlife Acoustics proprietary technique for shifting bat sounds to the ...
A multibeam echosounder is a device typically used by hydrographic surveyors to determine the depth of water and the nature of the seabed. Most modern systems work by transmitting a broad acoustic fan shaped pulse from a specially designed transducer across the full swathe acrosstrack with a narrow alongtrack then forming multiple receive beams (beamforming) that are much narrower in the ...
Gordon Smith's career as a medium began at the age of 24, when another medium told him that one day he would be 'on the platform'. This was the start of a 15-year-long study to be a medium.
Swedish soldiers operating an acoustic locator in 1940. Acoustic location is a method of determining the position of an object or sound source by using sound waves. Location can take place in gases (such as the atmosphere), liquids (such as water), and in solids (such as in the earth).
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