echolocation, echo sounding(noun)
determining the location of something by measuring the time it takes for an echo to return from it
The technique of using reflected pulses of sound to determine depth or the location of objects (or fish) under water.
A particular measurement made using this technique.
Echo sounding is a type of SONAR used to determine the depth of water by transmitting sound pulses into water. The time interval between emission and return of a pulse is recorded, which is used to determine the depth of water along with the speed of sound in water at the time. This information is then typically used for navigation purposes or in order to obtain depths for charting purposes. Echo sounding can also refer to hydroacoustic "echo sounders" defined as active sound in water used to study fish. Hydroacoustic assessments have traditionally employed mobile surveys from boats to evaluate fish biomass and spatial distributions. Conversely, fixed-location techniques use stationary transducers to monitor passing fish. The word sounding is used for all types of depth measurements, including those that don't use sound, and is unrelated in origin to the word sound in the sense of noise or tones. Echo sounding is a more rapid method of measuring depth than the previous technique of lowering a sounding line until it touched bottom.
The numerical value of echo sounding in Chaldean Numerology is: 9
The numerical value of echo sounding in Pythagorean Numerology is: 8
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"echo sounding." Definitions.net. STANDS4 LLC, 2017. Web. 21 Nov. 2017. <http://www.definitions.net/definition/echo sounding>.