Patents by Inventor Mark E. Engebretson
Mark E. Engebretson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7606383Abstract: 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.Type: GrantFiled: October 5, 2005Date of Patent: October 20, 2009Assignee: QSC Audio Products, Inc.Inventors: Mark E. Engebretson, Luis F. Esparza
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Patent number: 7606384Abstract: A loudspeaker system consisting of a plurality of direct-radiating electro-acoustical drivers arrayed along a spiral line. The acoustical drivers may be 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 spiral 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.Type: GrantFiled: October 5, 2005Date of Patent: October 20, 2009Assignee: QSC Audio Products, Inc.Inventors: Mark E. Engebretson, Luis F. Esparza
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Publication number: 20080085026Abstract: 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.Type: ApplicationFiled: October 5, 2005Publication date: April 10, 2008Applicant: QSC AUDIO PRODUCTS, INC.Inventors: Mark E. Engebretson, Luis F. Esparza
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Publication number: 20080085028Abstract: A loudspeaker system consisting of a plurality of direct-radiating electro-acoustical drivers arrayed along a spiral line. The acoustical drivers may be 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 spiral 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.Type: ApplicationFiled: October 5, 2005Publication date: April 10, 2008Applicant: QSC AUDIO PRODUCTS, INC.Inventors: Mark E. Engebretson, Luis F. Esparza
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Publication number: 20080085027Abstract: 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.Type: ApplicationFiled: October 5, 2005Publication date: April 10, 2008Applicant: QSC AUDIO PRODUCTS, INC.Inventors: Mark E. Engebretson, Luis F. Esparza
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Patent number: 7333626Abstract: A system is disclosed for changing a coverage angle of sound produced from a loudspeaker system. The loudspeaker system includes an enclosure that projects sound at a predetermined angle. A sound integrator includes an inner surface positioned adjacent to a mid-range frequency sound source. An outer surface of the sound integrator includes a planar and a curved surface. The surfaces control the angle which sound radiates from the loudspeaker.Type: GrantFiled: February 28, 2006Date of Patent: February 19, 2008Assignee: Harman International Industries, IncorporatedInventors: Scott M. Opie, Mark E. Engebretson, Yoshiyuki Takeuchi
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Patent number: 7324654Abstract: A system is disclosed for changing a coverage angle of sound produced from a loudspeaker system. The loudspeaker system includes an enclosure that projects sound at a predetermined angle. A sound integrator includes an inner surface positioned adjacent to a mid-range frequency sound source. An outer surface of the sound integrator includes a planar and a curved surface. The surfaces control the angle which sound radiates from the loudspeaker.Type: GrantFiled: July 1, 2003Date of Patent: January 29, 2008Assignee: Harman International Industries, Inc.Inventors: Scott M. Opie, Mark E. Engebretson, Yoshiyuki Takeuchi
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Publication number: 20040131217Abstract: A system is disclosed for changing a coverage angle of sound produced from a loudspeaker system. The loudspeaker system includes an enclosure that projects sound at a predetermined angle. A sound integrator includes an inner surface positioned adjacent to a mid-range frequency sound source. An outer surface of the sound integrator includes a planar and a curved surface. The surfaces control the angle which sound radiates from the loudspeaker.Type: ApplicationFiled: July 1, 2003Publication date: July 8, 2004Inventors: Scott M. Opie, Mark E. Engebretson, Yoshiyuki Takeuchi
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Patent number: 4256389Abstract: A method and system of blending the effective audio sensation in a theater having a plurality of audio speakers driven by a single program signal recorded on a motion picture film strip as the film strip is being projected in the theater, which method and system includes the driving of each of the speakers in the theater with a common program signal through an amplifier having a gain controlled by an analog electrical signal whereby the level of the analog signal determines the volume of the program signal at each of the speakers and creating a digital gain control signal for each of the speakers in response to a control signal recorded periodically on the film strip at locations on the film strip determined by the desired volume of a given speaker at a given time which digital gain control signal is converted to an analog signal and is used for controlling the driving amplifiers of each of the speakers in the theater in which the film is being projected.Type: GrantFiled: December 31, 1979Date of Patent: March 17, 1981Assignee: Paramount Sound Systems CorporationInventor: Mark E. Engebretson