Patent ID: 11950047
Assignee: PSS BELGIUM NV
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A loudspeaker for producing sound at bass frequencies including:
a diaphragm;
a frame, wherein a proximal end of the diaphragm is suspended from the frame by at least one proximal suspension element, wherein the at least one proximal suspension element is configured to substantially prevent translational movement of the proximal end of the diaphragm relative to the frame, whilst permitting translational movement of a distal end of the diaphragm which is opposite to the proximal end of the diaphragm, wherein the diaphragm has a plurality of harmonic modes including a first harmonic mode and a second harmonic mode;
a drive unit configured to move the distal end of the diaphragm based on an electrical signal;
wherein the drive unit is configured to apply force to the diaphragm at a location on the diaphragm that corresponds to a node in the second harmonic mode of the diaphragm.