Title:
【発明の名称】音響フィードバックを補償する補聴器
Document Type and Number:
Japanese Patent JP3115602
Kind Code:
B2
Abstract:
PCT No. PCT/DK93/00332 Sec. 371 Date Apr. 13, 1995 Sec. 102(e) Date Apr. 13, 1995 PCT Filed Oct. 8, 1993 PCT Pub. No. WO94/09604 PCT Pub. Date Apr. 28, 1994A hearing aid with digital, electronic compensation for acoustic feedback comprises a microphone (5), a preamplifier (7), a digital compensation circuit (3), an output amplifier (9) and a transducer (11). The digital circuit (3) comprises a noise generator (33) for the insertion of noise, and an adjustable, digital filter (27) for the adaptation of the feedback signal. The adaptation takes place using a correlation circuit (31). The circuit further comprises a digital circuit (210) which monitors the loop gain and regulates the hearing aid amplification via a digital summing circuit (211), so that the loop gain is less than a constant K. The circuit further comprises a digital circuit (79) which carries out a statistical evaluation of the filter coefficients in the correlation circuit, and changes the feedback function in accordance with this evaluation.
Inventors:
Roy Schoogard, Hansen
Application Number:
JP50952794A
Publication Date:
December 11, 2000
Filing Date:
October 08, 1993
Export Citation:
Assignee:
GENRE sound actiesel scab
International Classes:
H04R3/02; H04R25/00; (IPC1-7): H04R25/00; H04R3/02
Domestic Patent References:
| JP3157098A |
Other References:
【文献】米国特許5201006(US,A)
【文献】米国特許5091952(US,A)
【文献】米国特許5091952(US,A)
Attorney, Agent or Firm:
Takashi Ishida (2 outside)