Patent · US Active

Loudspeaker

US12395786B2 · kind B2 · utility

0Cited by

6References

18Claims

0Family size

Assignee

HARMAN BECKER AUTOMOTIVE SYSTEMS GMBH · DE

Inventors

Xipeng Ye
Xin Liu · Beijing, CN
Andreas Pfeffer · Wenzenbach, DE
Richard Josef Kralik · Petershausen, DE

Key dates

Filing date	Dec 13, 2022
Grant date	Aug 19, 2025
Priority date	—
Expiry date	Jul 13, 2043

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2499/13
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.