
1) Electromagnetic coil
Found on
https://www.crosswordclues.com/clue/voice-coil

A voice coil (consisting of a former, collar, and winding) is the coil of wire attached to the apex of a loudspeaker cone. It provides the motive force to the cone by the reaction of a magnetic field to the current passing through it. The term is also used for voice coil linear motors, which produce a larger force and move a longer distance but wo...
Found on
http://en.wikipedia.org/wiki/Voice_coil

(from the article `loudspeaker`) ...in which the acoustical signal energy does not correspond in form to the electrical signal. The part of the speaker that converts electrical into ... Most loudspeakers are of the electromagnetic, or dynamic, variety, in which a voice coil moves in the gap of a permanent magnet when a time-varying ... ...
Found on
http://www.britannica.com/eb/a-z/v/33

Coil attached to the diaphragm of a moving coil loudspeaker. The coil is moved through an air gap between magnetic pole pieces.
Found on
https://www.encyclo.co.uk/local/20687

The cylindrical coil of wire that moves in the magnetic field of a dynamic driver. The voice coil is
Found on
https://www.encyclo.co.uk/local/22369

The voice coil is the coil of wire fixed to a cylinder at the apex of the loudspeaker cone that inte
Found on
https://www.encyclo.co.uk/local/22369
No exact match found.