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:
Oct. 20, 2009
Filed:
Oct. 05, 2005
Mark E. Engebretson, Huntington Beach, CA (US);
Luis F. Esparza, Chino Hills, CA (US);
Mark E. Engebretson, Huntington Beach, CA (US);
Luis F. Esparza, Chino Hills, CA (US);
QSC Audio Products, Inc., Costa Mesa, CA (US);
Abstract
A loudspeaker system consisting of a plurality of direct-radiating electro-acoustical drivers arrayed along a curved line. While in one embodiment the curved line array may be a spiral array, in another embodiment it may be any curved line array (such as an arcuate array). The acoustical drivers are directly coupled to an acoustical waveguide without use of adapters or a throat section. The waveguide and the acoustical drivers may thus be oriented along the curved line so as to produce controlled vertical and horizontal angular coverage with improved phase coherence and reduced distortion. A plurality of phase plugs may be interspersed between the plurality of acoustical drivers to assist in equalizing the sound path to achieve uniform phase at the mouth of the waveguide.