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FOUR-CHANNEL HEADPHONE

  • US 3,796,840 A
  • Filed: 12/02/1971
  • Issued: 03/12/1974
  • Est. Priority Date: 12/05/1970
  • Status: Expired due to Term
First Claim
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1. A four-channel headphone comprising:

  • a. a pair of left and right headphone body casings respectively applied to the left and right ears of a listener;

    b. first and second speakers disposed in said left headphone body casing so that when said headphone is applied to the ears of the listener said first speaker is to the front of the left ear of the listener and said second speaker is to the rear of the left ear of the listener;

    c. third and fourth speakers disposed in said right headphone body casing so that when said headphone is applied to the ears of the listener said third speaker is to the front of the right ear of the listener and said fourth speaker is to the rear of the right ear of the listener;

    d. first means for supplying to said first speaker a first channel signal which corresponds to a sound emanating from the front and left of the listener;

    e. first switch means mounted in said left head-phone body casing and being set to selectively reverse connections, said first switch means having input terminals and output terminals, said output terminals being electrically connected to said second speaker;

    f. second means for supplying across said input terminals of said first switch means a second channel signal which corresponds to a sound emanating from the rear and left of the listener;

    g. third means for supplying to said third speaker a third channel signal which corresponds to a sound emanating from the front and right of the listener;

    h. second switch means mounted in said right headphone body casing and being set to selectively reverse connections, said second switch means having input terminals and output terminals, said output terminals of said second switch means being electrically connected to said fourth speaker; and

    i. fourth means for supplying across said input terminals of said second switch means a fourth channel signal which corresponds to a sound emanating from the rear and right of the listener.

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