RECESSED FLAT LOUDSPEAKER Russian patent published in 2021 - IPC H04R9/06 

FIELD: acoustics.

SUBSTANCE: invention relates to acoustics, in particular to flat loudspeakers. The built-in flat loudspeaker includes a housing, a flat membrane and a transverse acoustic wave acoustic vibration drive. The housing is made in the form of a flat support frame, and a sound-emitting flat rectangular membrane is fixed on the frame, the membrane is made in the form of a honeycomb filler, a surface layer glued to the honeycomb structure on both sides and a stabilizing impregnating composition based on polyurethane primers and varnishes covering the surface layers, reverse the side of the diaphragm is covered with a damping layer. The drive of acoustic vibrations is made in the form of at least one exciter of acoustic vibrations, including ferrite parts of the magnetic circuit. The acoustic vibration exciter is fixed on a flat support frame by means of a bridge and is attached at one end to a flat membrane within a line passing along the plane of a rectangular membrane and coming out of any vertex of a rectangular membrane, and ending at a point on the opposite vertex of the horizontal side of the membrane located at a distance of 2 / 3 of the opposite side of the membrane from the top horizontally.

EFFECT: technical result is to improve the quality of sound reproduction, reduce the installation depth for mounting the loudspeaker and simplify the installation.

2 cl, 8 dwg