Electrical audio signal processing systems and devices – Hearing aids – electrical
Reexamination Certificate
2006-07-25
2006-07-25
Ni, Suhan (Department: 2646)
Electrical audio signal processing systems and devices
Hearing aids, electrical
C381S060000
Reexamination Certificate
active
07082205
ABSTRACT:
The application relates to an in-situ method to measure and correct or adjust sound signal presented to the eardrum by means of a hearing aid and a hearing aid employing such a method. The hearing aid comprises at least one microphone (1), at least one digital signal processor (2) for transforming the microphone signal into a transformed signal according to a desired transformation function, a receiver (3), a sensing means (4) for sensing the sound signal appearing in front of the eardrum and at least one comparison mans (5). A model of the electroacoustic system of the ear and the hearing aid is established and stored in the hearing aid, which model simulates the sound signal in the ear canal in front of the eardrum. The model is adapted in response of an error signal generated in case the difference between the representation of the sensed signal and the simulated sound signal and the simulated sound signal is above a predetermined threshold.
REFERENCES:
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patent: 6173063 (2001-01-01), Melanson
patent: 6353671 (2002-03-01), Kandel et al.
patent: 6434246 (2002-08-01), Kates et al.
patent: 6658122 (2003-12-01), Westermann et al.
patent: 624524 (1981-07-01), None
Gregory P. Widin, “The Meaning of Digital Technology”, Hearing Instruments, vol. 38, No. 11, Nov. 1, 1987, p. 28 and 30, 32/33 74 XP000611160.
Ni Suhan
Widex A/S
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