hum-bucking coil

hum-bucking coil

[′həm ‚bək·iŋ ‚kȯil]
(engineering acoustics)
A coil wound on the field coil of an excited-field loudspeaker and connected in series opposition with the voice coil, so that hum voltage induced in the voice coil is canceled by that induced in the hum-bucking coil.
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