Radio receiver with audio selectivity

Telecommunications – Receiver or analog modulated signal frequency converter – Noise or interference elimination

Patent

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Details

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

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