Title:
ビーム形成特性を有する補聴器
Document Type and Number:
Japanese Patent JP4468588
Kind Code:
B2
Abstract:
A hearing aid with beam forming properties, having at least two microphone channels (1a, 1b) for at least two microphones (2a, 2b), the microphone channels each comprising an analog to digital converter (3a, 3b) and having at least one programmable or program controlled signal processor (5), as well as a digital to analog converter, and at least one receiver and a battery for power supply. The hearing aid particularly comprises in each microphone channel (1a, 1b) a sigma-delta-type analog to digital converter (3a, 3b) including a digital low pas filter and a decimator 94) for converting a 1 Bit Stream of a high clock frequency into a digital word sequence of a lower clock frequency. At least one of the at least two microphone channels contains a controllable delay device (6) connected to the input side of the respective digital low pass filter and decimator (4) of the channel, the delay device (6) being controllable by the at least one signal processor (5). The delay device is preferably integrated into the sigma-delta-ADC (3).
Inventors:
Andersen Henning Haugart
Ludofifsen Karl
Ludofifsen Karl
Application Number:
JP2000597977A
Publication Date:
May 26, 2010
Filing Date:
February 05, 1999
Export Citation:
Assignee:
Vedex Acty Selscap
International Classes:
H04R25/00
Domestic Patent References:
| JP7502120A | ||||
| JP6156600A |
Attorney, Agent or Firm:
Kenji Ushiku
Tadashi Inoue
Takaaki Teiaki
Tadashi Inoue
Takaaki Teiaki