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:
Nov. 29, 2011
Filed:
Sep. 22, 2010
Nicholas Sheppard Bromer, Marietta, PA (US);
Nicholas Sheppard Bromer, Marietta, PA (US);
Other;
Abstract
A compact bass speaker cabinet uses a long, narrow, tapered waveguide that acts as does a small radial portion of the air outside a large pulsating sphere, and has the same bass response as the large pulsating sphere. The smaller end is closed and the longer end is open. In one embodiment the inside of the waveguide is a rectangle about an inch thick and substantially as wide as the speaker or speakers that are mounted on the wider surface close to or slightly overlapping the closed end; and the inside surfaces are tapered so that they meet at a point which lies beyond the closed end by a distance equal to the radian wavelength of the longest sound wave that is to be produced.