The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2014
Filed:
Apr. 17, 2013
Applicant:
Gp Acoustics International Limited, Kwai Chung, HK;
Inventor:
Mark Alexander Dodd, Woodbridge, GB;
Assignee:
GP Acoustics International Limited, Kwai Chung, HK;
Primary Examiner:
Int. Cl.
CPC ...
H04R 1/02 (2006.01); H04R 1/20 (2006.01); H04R 5/00 (2006.01); H04R 1/28 (2006.01);
U.S. Cl.
CPC ...
H04R 5/00 (2013.01); H04R 1/288 (2013.01); H04R 1/2823 (2013.01);
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.