Diaphragm suspension for a loudspeaker

A loudspeaker including a chassis, a drive unit and a diaphragm;

• wherein the drive unit has a stationary part secured to the chassis and a translatable part secured to the diaphragm;
• wherein an outer edge of the diaphragm is suspended from the chassis by an edge suspension;
• wherein the edge suspension has a plurality of straight portions, each straight portion having a respective first surface and a respective second surface which meet along an edge to provide a spring which permits the diaphragm to be moved relative to the chassis by the drive unit;
• wherein the edge suspension has at least one corner portion, wherein the/each corner portion joins two of the straight portions together and includes at least one geometrical interruption formed therein;
• wherein the/each geometrical interruption formed in the/each corner portion includes a first corrugation which varies in height along a first path which extends circumferentially around the edge suspension, and a second corrugation formed within the first corrugation which varies in height along a second path which extends across the first path.

A passive radiator that includes a chassis and a diaphragm;

• wherein an outer edge of the diaphragm is suspended from the chassis by an edge suspension;
• wherein the edge suspension has a plurality of straight portions, each straight portion having a respective first surface and a respective second surface which meet along an edge to provide a spring which permits the diaphragm to be moved relative to the chassis;
• wherein the edge suspension has at least one corner portion, wherein the/each corner portion joins two of the straight portions together and includes at least one geometrical interruption formed therein;
• wherein the/each geometrical interruption formed in the/each corner portion includes a first corrugation which varies in height along a first path which extends circumferentially around the edge suspension, and a second corrugation formed within the first corrugation which varies in height along a second path which extends across the first path.