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Speaker system including phase shift such that the composite sound wave decreases on the principal speaker axis

  • US 5,828,763 A
  • Filed: 04/05/1993
  • Issued: 10/27/1998
  • Est. Priority Date: 08/31/1990
  • Status: Expired due to Fees
First Claim
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1. A speaker system for reproducing an audio signal, comprising:

  • a power amplifier for providing the audio signal;

    a first speaker for receiving the audio signal from said power amplifier;

    phase shifter means, coupled to receive the audio signal from the power amplifier, for shifting a phase of the received audio signal between ±

    120° and

    ±

    180°

    in the mid- and high-frequency ranges; and

    a second speaker for receiving the phase-shifted audio signal from said phase shifter means, a composite sound pressure wave of said first and second speakers decreasing on a principal axis (0°

    ) which corresponds to a line of symmetry of respective radiating axes of said first and second speakers;

    wherein said first and second speakers are mounted in a single cabinet such that the respective distances from said first and second speakers to a listener are equal to each other, and wherein the speaker system reproduces the audio signal such that the principal axis is directed towards the listener.

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