Loudspeaker system
Patent 4860363 Issued on August 22, 1989. Estimated Expiration Date: 
March 18, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 18, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References Re31679 2137032 3582553 3754618 Loudspeaker system with broad image source with directionality control for the tweeter Loudspeaker with wall reflex absorber Sound reproduction system and method Stereo signal reproducing system Stereo reproduction system Patent #: 4764960 InventorsApplicationNo. 07/171224 filed on 03/18/1988US Classes:381/89, Loudspeakers driven in given phase relationship381/306, With image presentation means381/333With furniture, clothing, or image presentation meansExaminersPrimary: Isen, Forester W.Attorney, Agent or FirmInternational ClassesH04R 5/02 (20060101)H04R 1/32 (20060101) Foreign Application Priority Data1985-04-12 JPAbstractThe present invention includes a loudspeaker system in which sound radiation axes of two speakers in a single loudspeaker unit form an angle with respect to each other in a horizontal plane to increase the size of a listening area. The horizontal angle can be formed by orienting the sound axes of speakers in the loudspeaker unit at an angle in the range of 15 to 45 degrees from each other. The system also includes a phase adjustment system which adjusts the phase of the speakers in each loudspeaker unit so that the phase of the sound from each speaker in each loudspeaker unit is properly adjusted throughout the increased listening area to provide increased sound presence or spread.Field of SearchLoudspeakers driven in given phase relationship | |
