FLAT LOUDSPEAKER Russian patent published in 2021 - IPC H04R7/04 

FIELD: acoustics.

SUBSTANCE: flat loudspeaker contains a housing in the form of a support frame, a sound-emitting rectangular membrane fixed to the frame, and an exciter of oscillations of the electrodynamic principle of action, located in the space opposite the membrane. Also, the oscillation exciter is attached at one end to the membrane within a special line passing along the plane of the rectangular membrane and coming out of any vertex of the 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 vertex horizontally. And 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.

EFFECT: improved quality of sound reproduction acoustic system.

8 cl, 6 dwg