Hearing aid with digital processing for: correlation of signals

Details Hearing aid with digital processing for: correlation of signals Hearing aid with digital processing for: correlation of signals

1978-04-07

1980-02-05

Stellar, George G.

179107R, H04R 2500

Patent

active

041874137

ABSTRACT:
In an illustrated embodiment a behind-the-ear hearing aid includes a microphone, an amplifier-low pass filter circuit, an analog to digital converter, a digital integrated circuit arithmetic and logic unit for implementing a n-th order transfer function in the Z domain, a digital to analog converter and an output transducer, for producing the desired sound response. A memory multiplexer is provided for loading of the multiplier coefficients necessary to adapt the transfer function circuit to essentially any class of hearing deficiency into an erasable programmable read only memory (EPROM). The structure is such that the coefficient memory may be loaded after the standard universal hearing aid has been completely assembled, and indeed the hearing aid may be reprogrammed as needed after a period of use, essentially without disassembly.

REFERENCES:
patent: 3531595 (1970-09-01), Demaree
patent: 3989904 (1976-11-01), Rohrer et al.
patent: 4051331 (1977-09-01), Strong et al.

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