# US 6,724,903 B2 · Microphone arrangement in a hearing aid to be worn behind the ear

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- Number: US 6,724,903 B2
- Document ID: US6724903B2
- Status: Granted
- Kind: B2
- Application number: 10/185,311
- Filed: 2002-06-28
- Published: 2003-01-02
- Granted: 2004-04-20
- Earliest claimed: 2001-06-28
- Assignees: Siemens Audiologische Technik GmbH
- Inventors: Torsten Niederdrank
- Web page: https://patentgrep.com/patent/US6724903B2

## CPC

- H04R 25/402: {using contructional means}
- H04R 1/342: {for microphones}
- H04R 1/38: in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
- H04R 25/604: {of acoustic or vibrational transducers}
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)

## Abstract

In a microphone with a microphone housing for arrangement in a hearing aid to be worn behind the ear having a hearing aid housing, respective sound entry nozzles with respective sound entry apertures are arranged at two opposite sides of the microphone housing. The sound entry nozzles discharge into a chamber at a side of the microphone membrane. The sound entry nozzles are introduced into the respective sound entry apertures in opposite sides of the hearing aid housing, and when the hearing aid is worn, the sound entry aperture of one sound entry nozzle is disposed approximately distally from the head and the sound entry aperture of the other sound entry nozzle is disposed approximately proximally relative to the head. The microphone is space-saving and is simple to arrange in the hearing aid.

## Claims

### Claim 1

A behind-the-ear hearing aid comprising:
a hearing aid housing having two opposite lateral sides, each of said two opposite lateral sides having a laterally-facing sound entry aperture therein; and
a microphone having a microphone housing disposed inside said hearing aid housing between said two opposite lateral sides of said hearing aid housing, said microphone housing having a pair of sound entry nozzles respectively projecting into said sound entry apertures in said hearing aid housing so that when said hearing aid is worn, one of said sound entry apertures for one of said sound entry nozzles is disposed facing toward a head of a hearing aid wearer, and the other of said sound entry apertures of the other of said sound entry nozzles is disposed farther from and facing away from the head of the hearing aid wearer.

### Claim 2 (depends on 1)

A behind-the-ear hearing aid as claimed in claim 1 wherein said microphone comprises a plurality of pairs of sound entry nozzles, with the respective sound entry nozzles in each pair being disposed at opposite sides of said microphone housing.

### Claim 3 (depends on 2)

A behind-the-ear hearing aid as claimed in claim 2 wherein said microphone has a microphone chamber with a membrane therein, and wherein the respective sound entry nozzles of one of said plurality of pairs discharge into said chamber at a first side of said microphone membrane, and the respective sound entry nozzles of another of said plurality of pairs discharge into said chamber at a second, opposite side of said microphone membrane.

### Claim 4 (depends on 2)

A behind-the-ear hearing aid as claimed in claim 2 wherein each of said plurality of pairs of laterally-facing sound entry nozzles is introduced into a pair of sound entry apertures respectively in the opposite lateral sides of said hearing aid housing, with each pair of sound entry nozzles, and the respective apertures into which said sound entry nozzles are introduced, are disposed along a common symmetry axis.