Electrical audio signal processing systems and devices – Hearing aids – electrical – Spectral control
Reexamination Certificate
2006-03-07
2006-03-07
Mei, Xu (Department: 2644)
Electrical audio signal processing systems and devices
Hearing aids, electrical
Spectral control
C381S321000, C381S317000
Reexamination Certificate
active
07010136
ABSTRACT:
An apparatus for and method of employing an electronic hearing aid device to assist a hearing impaired patient. The resonance curve of the outer auditory canal of the patient is determined. A device in accordance with the present invention is tuned to a frequency response curve which matches the measured resonance curve. The device is tuned by adjusting the overshoot of a low pass filter stage which is interposed between the microphone input and a class D output stage.
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Bren Mark A.
Preves David A.
Roberts Randall W.
Mei Xu
Micro Ear Technology Inc.
Schwegman Lundberg Woessner & Kluth P.A.
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