DYNAMIC LOUDSPEAKER WITH FLAT CORRUGATED AND CELLULAR MEMBRANE Russian patent published in 2016 - IPC H04R7/14 

FIELD: acoustics.

SUBSTANCE: invention relates to acoustics, particularly to electrodynamic loudspeakers. Loudspeaker has a rigid frame whereto permanent magnet, sound forming membrane on the upper suspension, lower centering diaphragm and voice coil on the frame. Membrane represents a relief surface in the form of alternating ledges and recesses and/or cellular array in form of a disc with parallel planes. Sound forming membrane has sufficient for mechanical transfer and uniform distribution of vibration load along the whole surface of the membrane at connection with the voice coil frame. Sound forming membrane connection with the frame of the voice coil is realized via the central part of the membrane, and/or middle part of the membrane, and/or peripheral part of the membrane. Sound forming membrane along the perimeter is equipped with a corrugated or cellular element made in a form of a circle and attached to the upper suspension. Recesses are made in the form of concentric or radial corrugations. Membrane is connected with upper suspension by gluing through the ring. Projection height of the membrane is 1/15-1/20 of its diameter. Corrugation sides are conjugated to 110-130°. Recesses of the membrane are closed annular convex inserts.

EFFECT: technical result is high sound quality.

17 cl, 16 dwg