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 work on the same principle.
Read more about Voice Coil: Operation, Design Considerations, Overhung & Underhung Coils, Other Uses For The Term
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—Herman Melville (1819–1891)