The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2025
Filed:
Dec. 13, 2022
Applicant:
Harman Becker Automotive Systems Gmbh, Karlsbad, DE;
Inventors:
Xipeng Ye, SIP.Suzhou, CN;
Xin Liu, SIP.Suzhou, CN;
Andreas Helmut Pfeffer, Wenzenbach, DE;
Richard Josef Kralik, Petershausen, DE;
Assignee:
Harman Becker Automotive Systems GmbH, Karlsbad-Ittersbach, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 1/28 (2006.01); H04R 1/02 (2006.01); H04R 9/06 (2006.01);
U.S. Cl.
CPC ...
H04R 1/2834 (2013.01); H04R 1/025 (2013.01); H04R 9/066 (2013.01); H04R 2400/11 (2013.01);
Abstract
A loudspeaker comprises a first diaphragm, a second passive diaphragm, and a drive unit coupled to the first diaphragm. The drive unit is configured to drive the first diaphragm in a direction of excursion upon applying electrical energy to the drive unit. The second passive diaphragm is arranged opposing the first diaphragm. The second passive diaphragm is mainly driven by sound waves emitted from the first diaphragm.