Patent · US Active

Sound channel for a hearing apparatus and corresponding production process

US8094849B2 · kind B2 · utility

3Cited by

5References

19Claims

0Family size

Assignee

Siemens Medical Instruments Pte. Ltd. · SG

Inventors

Björn Freels · Koblenzer Straße, DE
Holger Kral · Erlangen, DE

Key dates

Filing date	Sep 18, 2008
Grant date	Jan 10, 2012
Priority date	—
Expiry date	Nov 10, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH04R1/34
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A mechanically more stable and more complexly molded sound channel is to be provided for a hearing apparatus. Provision is made to this end for a sound channel, which has three sections in the longitudinal direction, the middle section of which has a different curvature or a larger internal circumference than the two outer sections, to be produced by injection molding. Here a negative of the sound channel is fixed within the injection molded form, with the negative consisting of a first material. The injection molded form with a second material, which has a higher melting point than the first material, is then extruded. The negative is then melted or burnt out of the cast sound channel. Very complex sound channel forms, for instance also with cavities and branching, can be realized in this way.

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