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:
Sep. 15, 1998
Filed:
Dec. 04, 1996
J Richard Aylward, Ashland, MA (US);
Timothy Holl, Medway, MA (US);
William P Schreiber, Ashland, MA (US);
Bose Corporation, Framingham, MA (US);
Abstract
Electroacoustical transducing apparatus includes an input for receiving an audio electrical signal. A first electroacoustical transducer is constructed and arranged to radiate first sound waves in a first direction in a first frequency range in response to an audio electrical signal on the input. A second electroacoustical transducer is constructed and arranged to radiate sound energy in a second direction in a second frequency range. A third electroacoustical transducer is constructed and arranged to radiate sound energy in a third direction within the second frequency range. Intercoupling circuitry intercouples the input with the second transducer and the third transducer and is constructed and arranged to cause the second transducer and the third transducer to radiate sound energy in the second and third directions in response to an audio electrical signal on the input relatively phased with respect to energy radiated in the second frequency range by the first transducer in the second and third directions in phase opposition therewith to oppose radiation in second and third directions from the first transducer within the second frequency range, the first frequency range being greater than and embracing the second frequency range.