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. 24, 2009
Filed:
Jun. 11, 2004
Jeffrey Hoefler, Framingham, MA (US);
John H. Wendell, Framingham, MA (US);
Robert P. Parker, Framingham, MA (US);
Thomas A. Froeschle, Framingham, MA (US);
William P. Schreiber, Framingham, MA (US);
Jeffrey Hoefler, Framingham, MA (US);
John H. Wendell, Framingham, MA (US);
Robert P. Parker, Framingham, MA (US);
Thomas A. Froeschle, Framingham, MA (US);
William P. Schreiber, Framingham, MA (US);
Other;
Abstract
A waveguide system for radiating sound waves. The system includes a low loss waveguide for transmitting sound waves, having walls are tapered so that said cross-sectional area of the exit end is less than the cross-sectional area of the inlet end. In a second aspect of the invention, a waveguide for radiating sound waves, has segments of length approximately equal to where l is the effective length of said waveguide and n is a positive integer. The product of a first set of alternating segments is greater than the product of a second set of alternating segments, in one embodiment, by a factor of three. In a third aspect of the invention, the first two aspects are combined.