Patent ID: 9467782
Filing Date: 2016-10-11
CPC Classification: H04R

Claim Text:
1. A diaphragm for a loudspeaker, wherein the diaphragm is formed generally in a closed loop around a central void, the loop lying in a plane, the diaphragm having an axis in a direction orthogonal to the plane along which axis the diaphragm is arranged to be driven in use, the diaphragm having inner and outer circumferential edges which are adapted, in use, to be fixed in position, wherein a substantial portion of the diaphragm between the inner and outer edges is shaped in the direction of the said axis so as to protrude from the general plane of the diaphragm in either or both directions along the axis, wherein said shaped portion when viewed along the direction of the axis comprises at least one series of curves and wherein the at least one series of curves extend either substantially uninterruptedly across the majority of the radial distance between the inner and outer edges of the diaphragm, or across at least 90% of the radial distance between at least one of the inner and/or outer edges and a region, between the inner and outer edges of the diaphragm, which is configured for coupling to a coil for driving the diaphragm in the said direction.