Telecommunications – Receiver or analog modulated signal frequency converter – Noise or interference elimination
Patent
1981-11-03
1984-02-28
Bookbinder, Marc E.
Telecommunications
Receiver or analog modulated signal frequency converter
Noise or interference elimination
455307, 455312, 381 17, 381 71, 381 94, H04B 112
Patent
active
044345089
ABSTRACT:
A system is disclosed in which signals are presented to a listener with a spatial impression in which the signal which is desired appears to be coming from a source in front of the listener while other signals appear to be coming from audio sources to the right and left of the listener. The same is achieved through a combination of a heterodyne type detector and a combination of high pass and low pass filters receiving the output of the detector. The outputs of the high and low pass filters are separately amplified and each sent to one ear of the listener.
REFERENCES:
patent: 2452499 (1948-10-01), Siezen
patent: 2474191 (1949-06-01), Reid et al.
patent: 2571957 (1951-10-01), Singel
patent: 2616970 (1952-11-01), Broos
patent: 2835889 (1958-05-01), Dyer
patent: 2846519 (1958-08-01), Morrell, Jr.
patent: 3311833 (1967-03-01), Lewis et al.
patent: 4192970 (1980-03-01), Kahn
American Systems Corporation
Bookbinder Marc E.
Handal Anthony H.
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