Patent · US Active

In-ear earphone

US8280094B2 · kind B2 · utility

8Cited by

3References

20Claims

0Family size

Assignee

AKG Acoustics GmbH · AT

Inventors

Hannes Lehdorfer · Wien, AT
Berthold Pavitsich · Müllendorf, AT
Bernhard Pinter · Moosbrunn, AT

Key dates

Filing date	Aug 31, 2010
Grant date	Oct 2, 2012
Priority date	—
Expiry date	May 27, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04R1/26
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An earphone device converts electric signals to audible sound. The earphone includes a first electroacoustic transducer and a second electroacoustic transducer. A separating part of the earphone is positioned between the second transducer and a sound opening of a plug area of the earphone. The separating part forms a barrier between a first sound path for the first transducer and a second sound path for the second transducer. The first sound path comprises a substantially annular cross-section disposed around the second sound path. The earphone includes a filter disk arranged in the sound opening, in which an acoustic friction is provided for each of the first and second sound paths.

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