1) Percussion instrument
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https://www.crosswordclues.com/clue/geophone
A geophone is a device that converts ground movement (displacement) into voltage, which may be recorded at a recording station. The deviation of this measured voltage from the base line is called the seismic response and is analyzed for structure of the earth. ==Etymology== The term geophone derives from the Greek word `γῆ (ge) ` meaning `ea......
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http://en.wikipedia.org/wiki/Geophone
[musical instrument] The geophone is a percussion instrument, invented by the French composer Olivier Messiaen for use in his large composition for piano and orchestra entitled Des canyons aux étoiles… (`From the canyons to the stars…`). It consists of a drum filled with thousands of small lead pellets, and is played by swirling it aro...
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http://en.wikipedia.org/wiki/Geophone_(musical_instrument)
device for detecting sound waves underground
Found on
http://phrontistery.info/g.html
trade name for an acoustic detector that responds to ground vibrations generated by seismic waves. Geophones—also called jugs, pickups, and ... [3 related articles]
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http://www.britannica.com/eb/a-z/g/22
In seismic exploration this is the acoustical sensor for collecting reflected waves.
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http://www.encyclo.co.uk/visitor-contributions.php
geophone 1. A seismic device used to detect vibrations in the earth. 2. A device for detecting sound waves underground. 3. A seismic transducer that responds to motions of the ground at locations on or below the surface of the earth. 4. A trademark referring to an instrument designed to detect vibrations passing through rocks, soil, or ice.
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http://www.wordinfo.info/words/index/info/view_unit/2737/5
No exact match found.
