Method and apparatus for improving binaural hearing

Electrical audio signal processing systems and devices – Sound effects – Reverberators

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381 74, H04B 1500, H04R 2500

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active

045312290

ABSTRACT:
A method and apparatus for improving binaural auditory response for the hearing impaired employs a console in which two microphones are mounted flush with the top surface of the console to eliminate pick up of surface reflections and in which the microphones are spaced to optimize binaural response. The console is adapted to be supported on a table, or the like, to place the microphones closer to the source of sound than is possible with body-attached microphones. Processing circuitry in the console includes two separate signal channels in which the gains are automatically controlled with a common AGC circuit having a fast response section for eliminating sudden noises and a slow response section for controlling the average amplitude level. The fast response section is biased to require a higher level input signal before responding in order to prevent it from cutting off the onset of normal sounds. The AGC circuit is controlled by the channel which receives the higher level signal. The console output signals are transmitted by cable or wireless transmission to respective earphones, with individual channel level adjustment controls being interposed in the transmission path. A plurality of users can listen to the console output simultaneously and can control the volume in each channel independently and independently of other users.

REFERENCES:
patent: 2837607 (1958-06-01), McGee
patent: 3509289 (1970-04-01), Briskey et al.
patent: 4181818 (1980-01-01), Shenier
patent: 4405831 (1983-09-01), Michelson
patent: 4425481 (1984-01-01), Mansgold et al.
Allied Radio, 1967 Catalog (1966), p. 160.
Radio Shack, 1980 Catalog (1979), pp. 37 and 46.
Stereo Catalog, 1981 (1980), Ziff & Davis Publishing Co., p. 208.

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