Electrical audio signal processing systems and devices – Binaural and stereophonic – Hearing aid
Patent
1987-04-14
1989-06-06
Isen, Forester W.
Electrical audio signal processing systems and devices
Binaural and stereophonic
Hearing aid
381 89, 381 90, 381205, 181145, H04R 502
Patent
active
048378267
ABSTRACT:
A stereophonic baffle comprises a first transducer group (7 to 10) located along a first line and fed by a right signal of a Hi-Fi chain and a second group of transducers (11 and 15) located according to a second line, forming an angle with the first line, and fed by a left signal. The left and right signals feeding the groups of transducers (7 and 10 and 11 to 15) are in phase and the path (a to e) separating the active zones of the two associated transducers (6,11; 7,12; 8,13; 9,14; 10,15) is equal to an odd multiple of the half wave length of a frequency comprised between 300 and 1000 Hz thus creating an acoustic coupling for the frequency, between the two transducers. The coupling frequencies of the different transducer couples are different.
REFERENCES:
patent: 3241631 (1966-03-01), Manieri
patent: 3947635 (1976-03-01), Frankman
patent: 4051919 (1977-10-01), Buettner
patent: 4054750 (1977-10-01), Montgomery et al.
patent: 4249037 (1981-02-01), Dexter
patent: 4256922 (1981-03-01), Gorike
patent: 4267405 (1981-05-01), Russell
patent: 4503553 (1985-03-01), Davis
patent: 4572325 (1986-02-01), Schupbach
Feldman, Popular Science, "Sit-Anywhere Stereo", Aug. 1985, pp. 74, 75.
Isen Forester W.
SES Sound Electronic Systems S.A.
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