Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Split rim mounting
Patent
1993-01-21
1994-06-21
Isen, Forester W.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Split rim mounting
H04B 1500
Patent
active
053234677
ABSTRACT:
Sound is processed for therein enhancing wanted sound with respect to unwanted sound. The sound is distributed over a plurality of parallel pass bands. In each channel, possibly with excepting the lowest frequency channels, the envelope of the respective signals in that frequency band is detected. Next, the envelope, or in the lowest frequency channels, the signal itself is preferentially filtered for enhancing signals at the fundamental frequency of the wanted sound. Subsequently, as far as applicable, the signal filtered is modulated with the envelope found for the channel in question and all channel outputs are summed.
REFERENCES:
patent: 3094586 (1963-06-01), Dersch
patent: 3403224 (1968-09-01), Schroeder
patent: 3418429 (1968-12-01), Clapper
patent: 3431355 (1969-03-01), Rothauser et al.
patent: 4135590 (1979-01-01), Gaulder
patent: 4433435 (1984-02-01), David
patent: 4701953 (1987-10-01), White
patent: 4932063 (1990-06-01), Nakamura
patent: 5097510 (1992-03-01), Graupe
patent: 5212764 (1993-05-01), Ariyoshi
"A Theory of Multirate Filter Banks" IEEE Transactions on Acoustics, Speech and Signal Processing, vol. ASSP 35, No. 3, Mar. 1987, pp. 356-372.
"Evaluation of an Adaptive Comb Filtering Method for Enhancing Speech Degraded by White Noise Addition" IEEE Transactions on Acoustics . . . vol. ASSP-26, No. 4, Aug. 1978 pp. 354-358.
Isen Forester W.
Schreiber David L.
U.S. Philips Corporation
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