Below are possible answers for the crossword clue Listening device.
3 letter answer(s) to listening device
EAR
attention to what is said; "he tried to get her ear"
fruiting spike of a cereal plant especially corn
good hearing; "he had a keen ear"; "a good ear for pitch"
the externally visible cartilaginous structure of the external ear
the sense organ for hearing and equilibrium
TAP
a faucet for drawing water from a pipe or cask
a gentle blow
a light touch or stroke
a plug for a bunghole in a cask
a small metal plate that attaches to the toe or heel of a shoe (as in tap dancing)
a tool for cutting female (internal) screw threads
cut a female screw thread with a tap
dance and make rhythmic clicking sounds by means of metal plates nailed to the sole of the dance shoes; "Glover tapdances better than anybody"
draw (liquor) from a tap; "tap beer in a bar"
draw from or dip into to get something; "tap one's memory"; "tap a source of money"
draw from; make good use of; "we must exploit the resources we are given wisely"
furnish with a tap or spout, so as to be able to draw liquid from it; "tap a cask of wine"
make a solicitation or entreaty for something; request urgently or persistently; "Henry IV solicited the Pope for a divorce"; "My neighbor keeps so
8 letter answer(s) to listening device
EARPHONE
electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear; "it was not the typing but the earphones that she disliked"
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