FIELD: acoustics.
SUBSTANCE: invention relates to acoustics, particularly to loudspeakers. Loudspeaker has diaphragm, magnet, yoke, containing section of central pole inserted in centre of magnet, ring-shaped plate arranged around outer circular surface of said section of central pole yokes and attached to magnet. Cylindrical coil frame can move in axial direction and partially adjacent to section of yoke central pole. Voice coil is wound around coil frame. Part of voice coil is located in magnetic gap formed between plate and section of yoke central pole. Device also includes magnetic fluid medium filling magnetic gap. Magnetic field gradient is formed so that it provides possibility to change magnetic force acting on magnetic fluid medium, due to change of magnetic induction on circular direction of said section of central pole and change of magnetic induction in axial direction of said section of central pole. Minimum value of magnetic induction in circular direction is more than half maximum value of magnetic induction in axial direction.
EFFECT: technical result is high sound quality.
18 cl, 30 dwg
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