Patent · US Active

Electroacoustic miniature transducer for a hearing aid

US7702124B2 · kind B2 · utility

7Cited by

4References

8Claims

0Family size

Assignee

Siemens Audiologische Technik GmbH · DE

Inventors

Torsten Niederdraenk · Erlangen, DE
Joseph Sauer · Strullendorf, DE

Key dates

Filing date	Dec 19, 2003
Grant date	Apr 20, 2010
Priority date	—
Expiry date	Feb 21, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH04R25/00
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The penetration of moisture and dirt often leads to a premature failure of electroacoustic miniature transducers that are used in hearing aids. A transducer membrane of a miniature transducer is provided at least in part with a hydrophobic and/or oliophobic and/or biofilm-inhibiting coating that, because its layer thickness is less than 10 μm, does not significantly influence the acoustic characteristic of the miniature transducer, and that prevents degradation of the transmission characteristic due to moisture, or moisture-caused damage to the miniature transducer. In addition, the adherence of dirt particles is prevented.

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