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Bass reproduction speaker apparatus

  • US 5,588,065 A
  • Filed: 05/23/1995
  • Issued: 12/24/1996
  • Est. Priority Date: 12/20/1991
  • Status: Expired due to Fees
First Claim
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1. A bass reproduction speaker apparatus, comprising:

  • a cabinet with an opening, having a division member inside thereof;

    a speaker unit disposed at the division member;

    a passive radiator disposed in the opening;

    an amplifying means for driving the speaker unit;

    a detection means for detecting motion of a moving system of the speaker unit; and

    a feedback means for feeding back an output signal from the detection means to the amplifying means, the feedback means conducting both a velocity-type motion feedback and an acceleration-type motion feedback simultaneously over the same frequency band such that the acceleration-type motion feedback substantially aligns a height of peaks in an output sound pressure level versus frequency response of the speaker apparatus at two resonance frequencies in a low frequency range with each other, and the velocity-type motion feedback suppresses the peaks to obtain a substantially flat output sound pressure level over a wide range of low frequencies.

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