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Primary Examiner: Olms, Douglas W.
Assistant Examiner:
Attorney: Saffitz; Abraham A.

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Title: Quadriphonic sound pick-up and reproduction devices

Abstract: A sound pick-up and reproducing system, comprising a first and a second pair of directional microphones respectively disposed at a first and a second given distance from the sonic scene to be transmitted, said second distance being greater than said first distance, said four microphones being closely coupled; the system is characterized in that the spacing between the microphones of the second pair is substantially less than that between the microphones of the first pair, and in that the angular divergence between the sound pick-up axes of the second pair is substantially less than the angular divergence between the sound pick-up axes of the first pair of microphones.


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Inventors: Condamines, Roland J. (Chatillon-sous-Bagneux, FR)

Application Number: 545831
Filing Date: 1975-01-31
Publication_date: 1976-02-24
Assignee: Etablissement Public, Telediffusion de France (Paris, FR)
Primary Class(es): 381/19 369/89, 381/26
Other Classes:
US Patent Ref:
3686471Aug, 1972Takahashi179/1.

Other Refs: 984,601
Apr, 1962UK
Other References: Audio, Mar. 1961, Stage Sound, by Richard S. Levy, pp. 26-28 and 59.
IRE Transactions on Audio, Enhanced Stereo, by Benson, May-June 1961, pp. 63- 65.