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Personal wearable communication system with enhanced low frequency response

  • US 5,617,477 A
  • Filed: 03/08/1995
  • Issued: 04/01/1997
  • Est. Priority Date: 03/08/1995
  • Status: Expired due to Term
First Claim
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1. A personal wearable, portable communication and entertainment system comprising:

  • a hollow, closed structural member;

    a first transducer means mounted on said structural member;

    a second transducer means mounted on said structural member;

    said first and second transducer means positioned in spaced relation to each other on said structural member;

    driver means for driving said first and second transducer means with driving signals, said first and second transducer means being driven 180 degrees out-of-phase at a first frequency range and being driven in-phase at a second frequency range;

    said first frequency range being lower than said second frequency range;

    means for supplying audio signals to said first and second transducer means; and

    means for changing the relative phase of driving signals from said driving means when the out-of-phase response would have been approximately the same as the in-phase response;

    whereby the response of said system in said first frequency range is enhanced.

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