US 11,950,047 B2
Loudspeaker
David Corynen, Dendermonde (BE)
Assigned to PSS BELGIUM NV, Dendermonde (BE)
Appl. No. 17/611,648
Filed by PSS BELGIUM NV, Dendermonde (BE)
PCT Filed May 19, 2020, PCT No. PCT/EP2020/064002
§ 371(c)(1), (2) Date Nov. 16, 2021,
PCT Pub. No. WO2020/234316, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 1907267 (GB), filed on May 23, 2019.
Prior Publication US 2022/0201385 A1, Jun. 23, 2022
Int. Cl. H04R 7/20 (2006.01); H04R 1/02 (2006.01); H04R 1/06 (2006.01); H04R 1/28 (2006.01); H04R 7/04 (2006.01); H04R 7/06 (2006.01); H04R 7/18 (2006.01); H04R 9/06 (2006.01)
CPC H04R 1/2819 (2013.01) [H04R 1/028 (2013.01); H04R 1/06 (2013.01); H04R 1/288 (2013.01); H04R 7/04 (2013.01); H04R 7/06 (2013.01); H04R 7/18 (2013.01); H04R 9/06 (2013.01); H04R 2307/00 (2013.01); H04R 2400/11 (2013.01)] 14 Claims
OG exemplary drawing
 
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.