ACOUSTIC SYSTEM Russian patent published in 2015 - IPC H04R1/00 

FIELD: physics.

SUBSTANCE: acoustic system comprises a flat wooden panel with a cylindrical blind hole on the front surface. The blind hole holds a diffuser with a suspension which connects the diffuser with the front surface around the periphery, a magnetic coil and a centring washer. A magnetic system is mounted on the back wall of the panel behind the blind hole. In the back wall behind the blind hole there are perforation through-holes inscribed in the blind hole. The axes of the perforation through-holes lie on a circle around the magnet. A flat panel with at least two blind holes on the front surface can have blind holes of a different diameter and length, and the panel for each blind hole has a different thickness which corresponds to the dimensions of the blind hole and the length of the diffuser. The panel can be in the form of glued layers of plywood. A support can be mounted on the back wall of the panel.

EFFECT: high sound quality.

5 cl, 3 dwg