Patent · US Active

Receiver

US8363874B2 · kind B2 · utility

1Cited by

5References

5Claims

0Family size

Assignee

Sennheiser electronic GmbH & Co. KG · DE

Inventors

Axel Grell · Großburgwedel, DE
Markus Kuhr · Singapore, SG
Axel Bergmeier · Winsen (Aller), DE

Key dates

Filing date	Jan 5, 2009
Grant date	Jan 29, 2013
Priority date	—
Expiry date	Jul 1, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04R5/033
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

There is provided an earphone having at least one housing (10) and at least one electroacoustic transducer (20) having a first and a second surface (21, 22). The earphone further has a first volume (100) defined by the first surface (21) of the electroacoustic transducer (20) and by a first end (12) of the housing (10), and a second volume (200) defined by the second surface (22) of the electroacoustic transducer (20) and by a second end (11) of the housing (10). An opening (300) is provided between the first and second volumes (100, 200). A closing unit (30) serves to at least partially close the opening (300).

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