Patent ID: 6144751
Filing Date: 2000-11-07
Classification: H04R

Abstract:
A ported enclosure for an acoustic speaker, comprising:a housing having an exterior and having at least one internal chamber, said housing including means for mounting at least one acoustic speaker at least partially within said housing at least one internal chamber;a port connecting in fluid communication said housing at least one internal chamber with said exterior of said housing, said port constant, having a uniform cross-sectional area throughout and having a first member being substantially annular in cross-section, said first member being adjacent the exterior of said housing, said first member having an annular cross-sectional area;said port including a second member being substantially circular in cross-section, said second member being adjacent said at least one internal chamber, said second member having a circular cross-sectional area;said port including a third member between said first and said second members, said third member having a cross-sectional area and including means for transferring said second member circular cross-section area to said first member annular cross-section area, and said first member, said second member, and said third member each having substantially equal cross-sectional areas throughout their lengths.