Electrical audio signal processing systems and devices – Hearing aids – electrical – Noise compensation circuit
Patent
1997-06-02
2000-10-24
Chan, Wing F.
Electrical audio signal processing systems and devices
Hearing aids, electrical
Noise compensation circuit
455296, 455223, 455222, 455310, 381317, 381315, 381 712, 381 93, H04R 2500
Patent
active
061378887
ABSTRACT:
A problem in hearing aids or other audio/acoustic amplifier circuits is that external sources of EM energy may be coupled into the electronics of the hearing aid so as to contribute to the acoustic output. The invention provides a circuit for removing the effects of EM interference. A separate reference generator is used to detect the external EM energy. This is fed into an interference canceller which may be adaptive, which effectively removes the unwanted component in the hearing aid signal, leaving only a signal representative of the desired acoustic output.
REFERENCES:
patent: 1973197 (1934-09-01), Baker
patent: 2282977 (1942-05-01), Mast
patent: 2526388 (1950-10-01), Miller
patent: 2555426 (1951-06-01), Trautman et al.
patent: 2560676 (1951-07-01), White
patent: 2645900 (1953-07-01), Hutchison
patent: 2651914 (1953-09-01), Joy
patent: 2699154 (1955-01-01), Smith
patent: 2726512 (1955-12-01), Deitrickson
patent: 2728193 (1955-12-01), Bacchi
patent: 2729942 (1956-01-01), Billings et al.
patent: 2838910 (1958-06-01), Bacchi
patent: 2853057 (1958-09-01), McAuley
patent: 2982100 (1961-05-01), Sinclair
patent: 3491538 (1970-01-01), Pearson
patent: 3906257 (1975-09-01), Ivas
patent: 4546607 (1985-10-01), Kime
patent: 4631918 (1986-12-01), Rosman
patent: 4646517 (1987-03-01), Wright
patent: 4680798 (1987-07-01), Neumann
patent: 4707993 (1987-11-01), Kime
patent: 4762473 (1988-08-01), Tieben
patent: 4790019 (1988-12-01), Hueber
patent: 4815140 (1989-03-01), Wagner
patent: 4848085 (1989-07-01), Rosman
patent: 5129003 (1992-07-01), Saruta
patent: 5267321 (1993-11-01), Lanberg
patent: 5359448 (1994-10-01), Laslo
patent: 5402496 (1995-03-01), Soli et al.
patent: 5412734 (1995-05-01), Thomasson
patent: 5412735 (1995-05-01), Engebretson et al.
patent: 5447026 (1995-09-01), Stanley
patent: 5475759 (1995-12-01), Engebretson et al.
patent: 5946609 (1999-08-01), Morey
patent: 6035184 (2000-03-01), Koh
Tieben Inc. Brochure, U.S.A., Publication date unknown.
Peacock Inc. Brochure, Canada, Publication date unknown.
McClennon Robert Scott
Thorpe Leigh Alynne
Chan Wing F.
Harvey Dionne N.
Nortel Networks Corporation
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