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Definition of Voice coil
1. Noun. (electronics) A coil of wire attached to the apex of the cone of a loudspeaker that provides the motive force to the cone by the reaction of a magnetic field to the current passing through it. ¹
2. Noun. (electronics) A similar mechanism that positions the disk read-write head in a computer hard disk drive. ¹
¹ Source: wiktionary.com