1) Submarine detecting device
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https://www.crosswordclues.com/clue/hydrophone
A hydrophone (Ancient Greek ὕδωρ = water and φωνή = sound) is a microphone designed to be used underwater for recording or listening to underwater sound. Most hydrophones are based on a piezoelectric transducer that generates electricity when subjected to a pressure change. Such piezoelectric materials, or transducers can convert a sound ...
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http://en.wikipedia.org/wiki/Hydrophone
device for converting sound waves into electrical signals, similar in operation to a microphone but used primarily for detecting sound waves from an ... [1 related articles]
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http://www.britannica.com/eb/a-z/h/89
an underwater microphone that will listen to, or pick up, acoustic signals. A hydrophone converts acoustic energy into electrical energy and is used in passive underwater systems to listen only.
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http://www.coml.org/edu/glossary/g1.htm
transducer that produces electric signals in response to waterborne acoustic signals
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=801-32-26
When performing seismic exploration at sea an acoustical sensor is used to collect reflected waves.
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http://www.encyclo.co.uk/visitor-contributions.php
hydrophone An electroacoustic transducer for listening to sound transmitted through water; such as, detection of submarines by hydrophone and underwater seismic surveying by hydrophone.
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http://www.wordinfo.info/words/index/info/view_unit/1009/11
A hydrophone converts acoustic energy into electrical energy and is used in underwater passive systems for listening only. Hydrophones are usually used below their resonance frequency over a much wider frequency band where they provide uniform output levels.The beam width of a hydrophone determines its directivity. A narrow beam will give it greate...
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https://www.encyclo.co.uk/local/20687
Underwater microphone and ancillary equipment capable of picking up waterborne sounds. It was originally developed to detect enemy submarines but is now also used, for example, for listening to the sounds made by whales
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https://www.encyclo.co.uk/local/21221
a device for locating sources of sound under water, as for detecting submarines by the noise of their engines. · an instrument employing the principles of the microphone, used to detect the flow of water through a pipe. · an instrument used in auscultation, whereby sounds are intensified through a column of water.
Found on
https://www.infoplease.com/dictionary/hydrophone
No exact match found.
