Meaning of voice coil

voice' coil"

Pronunciation: [key]
— Elect. Elect.
  1. a moving coil that drives the diaphragm of a sound reproduction system, as a loudspeaker, by the interaction of a changing magnetic field that is produced by a current in the coil and a fixed magnetic field that is produced by permanent magnets.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.