Speaker device, sound source simulation system, and echo cancellation system

  • US 8,938,084 B2
  • Filed: 05/31/2011
  • Issued: 01/20/2015
  • Est. Priority Date: 06/02/2010
  • Status: Active Grant
First Claim
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1. A speaker device comprising a phase inversion type enclosure provided with a speaker unit and a bass reflex port,wherein the bass reflex port has a tubular body whose hollow cross-sectional area is gradually reduced along an axial direction of the bass reflex port from its openings to inside, and the tubular body has a constant size so that a length of the hollow cross-section in one direction does not change along the axial direction,wherein the opening of the bass reflex port, located at an inner position of the enclosure, is located opposite to the speaker unit, with the bass reflex port sandwiched therebetween,wherein a distance between a center position of the speaker unit and a center position of the opening, located at an outer position of the enclosure, is equal to or less than a diameter of the speaker unit,wherein the direction in which the length of the hollow cross-section does not change is the same direction as a direction in which the opening, located at the outer position of the enclosure, is opened.

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