Method and apparatus for restoring aged sound recordings

Details Method and apparatus for restoring aged sound recordings Method and apparatus for restoring aged sound recordings

1977-04-27

1980-01-29

Cook, Daryl W.

84 119, G11B 504, G10H 102

Patent

active

041862805

ABSTRACT:
The specification describes the restoration of old sound recordings. Old ordings, e.g. phonograph records or tape recordings having at least one substantial musical part such as a singing voice, a solo-instrument or the like, with a formant character, are restored by playing back with the production of an electrical acoustic signal. The amplitude of the acoustic signal is enhanced in frequency ranges which correspond to the formants of the significant musical part.

REFERENCES:
patent: 2808466 (1957-10-01), Olson et al.
patent: 2999905 (1961-09-01), Malinaric
patent: 3286248 (1966-11-01), Koss
patent: 3379839 (1968-05-01), Bennett
patent: 3688010 (1972-08-01), Freeman
patent: 3719782 (1973-03-01), Barnum
patent: 3956960 (1976-05-01), Deutsch
patent: 4101840 (1978-07-01), Fricke et al.

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