Loudspeaker
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United States of America Patent
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Aug 19, 2014
Grant Date -
Oct 24, 2013
app pub date -
Apr 17, 2013
filing date -
Apr 17, 2012
priority date (Note) -
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Abstract
A loudspeaker comprises a reflex port located within the enclosure at a point substantially co-incident with a nodal surface of at least one resonant mode within the enclosure. The amplitude of that resonance at the input to the duct is minimized, hence assisting in filtering out the effect of that resonance without needing absorptive material. Ideally, it is placed at the intersection of two or more nodal surfaces.
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