DYNAMIC LOUDSPEAKER WITH INTERNAL DOUBLE-CAVITY RESONATOR Russian patent published in 2020 - IPC H04R1/28 

FIELD: acoustics.

SUBSTANCE: invention relates to acoustics, particularly to loudspeakers. Dynamic loudspeaker comprises internal resonator, volume of which is formed from below by surface of core end of magnetic system, on the sides – the inner wall of the voice coil frame and from above the round fixed cover connected by the rod support to the core weight of the magnetic system, which forms along its periphery an annular slot with the diffuser surface and is divided by inner membrane into two cavities, acoustically connected by tunnel opening, located in the center of this membrane coaxially with frame. Inner membrane by peripheral diameter is glued to inner surface of voice coil frame in its upper part. Lower cavity of the resonator is acoustically connected to the rear field of DL through gap between voice coil and upper plate of magnetic system, and centering washer. Upper cavity of the resonator is acoustically connected to the frontal DL field through gap between annular surface of peripheral part of cover and diffuser surface. Annular slot is controlled by rotation of rod support in threaded connection with core weight and its height is tuning parameter of sound quality of DL.

EFFECT: high definition and spatiality of sound when the stereo effect is expanded to the entire listening area.

7 cl, 1 dwg