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Loudspeaker device

  • US 7,058,186 B2
  • Filed: 11/29/2000
  • Issued: 06/06/2006
  • Est. Priority Date: 12/01/1999
  • Status: Expired due to Fees
First Claim
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1. A loudspeaker device comprising:

  • an amplifier for amplifying an input signal;

    a cabinet having an opening;

    a loudspeaker unit mounted to the opening so as to close said cabinet for reproducing an output signal of said amplifier;

    a microphone placed in said cabinet for detecting an acoustic output of said loudspeaker unit; and

    a feedback circuit for feeding back an acoustic output signal of said microphone to an input of said amplifier,wherein said microphone is placed substantially at a position where sound pressure of resonance occurring in a closed space in said cabinet is a minimum for said closed space.

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