Hearing aid with recruitment compensation

Details Hearing aid with recruitment compensation Hearing aid with recruitment compensation

1976-07-20

1978-07-04

Brown, Thomas W.

179 1N, 179 1P, H04R 2900

Patent

active

040990354

ABSTRACT:
There is disclosed a speech processor for aiding persons with sensorineural hearing loss accompanied by recruitment. The apparatus processes speech into two channels by use of a low pass and a high pass filter. Each channel includes a compressor unit which serves to compress or expand speech according to predetermined frequency sensitive ratios. The outputs of the compressors are combined in a frequency equalizer network to provide a compensated signal which is directed to a hearing aid transducer to enable an improved response for a user. The disclosure also includes a two channel system which may be employed for designing and formulating specific characteristics for hearing aids for the handicapped.

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patent: 3927279 (1975-12-01), Nakamura et al.
patent: 4025723 (1977-04-01), Blackledge
E. Villchur, "Signal Processing to Improve Speech Intelligibility etc.", J. Ac. Soc. Am., vol. 53, No. 6, 1973.
S. Knorr, "A Hearing Aid for Subjects With High-Freq. Losses", IEEE Trans. on AC, S and SP, Dec. 1976.
P. Yanick et al., "Signal Processing to Improve Intelligibility in the Presence of Noise, etc.", IEEE Trans. AC, SP, and S.P., Dec. 1976.

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