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Inventor: Douglas J. Button


Address: Simi Valley, CA
No. of patents: 11
Last patent issue date: 12/04/2012

NumberTitleIssue Date
8325943Dual-coil, dual gap electromagnetic transducer with multiple channel amplifiers
A dual-coil, dual magnetic gap electromagnetic transducer is provided where each voice coil is wired to include separate leads so that each individual voice coil may be driven by a separate amplifier or by a separate bridged amplifier. Signal processing may further ...
12/04/2012
8130994Waveguide
A waveguide configured to function as a high frequency waveguide for a high frequency sound source mounted to the waveguide, and to function as an acoustical low pass filter for a low frequency sound source mounted behind the waveguide in a multi-way loudspeaker sys...
03/06/2012
8014555Self-cooling electromagnetic transducer
An electromagnetic transducer includes a housing, a diaphragm, a conductive coil, and a magnetic assembly having a plurality of air passages. The coil communicates with the diaphragm such that a flexible portion of the diaphragm is movable in response to movement of...
09/06/2011
7684574Reflective loudspeaker array
A reflective loudspeaker array is cooperatively operable with an acoustically reflective planar surface to provide a constructive combination of direct and reflected sound waves that produces a uniform sound field. The uniform sound field provides a controlled sound...
03/23/2010
7447318System for using digital signal processing to compensate for power compression of loudspeakers
This invention provides a compensation system capable of compensating for power loss due to the power compression effects of the voice coil as the temperature of the voice coil increases. To compensate for the power compression effect, the invention predicts or esti...
11/04/2008
7095869Loudspeaker coil suspension system
The invention provides a continuous layer of polymer that is shaped to act as the suspension, the former, and an attachment to the diaphragm. The coil may be located within the pocket providing insulation to the coil thus preventing electrical short circuiting of th...
08/22/2006
7072481Two-stage phasing plug system in a compression driver
This invention provides a two-stage phasing plug located within a compression driver. The two-stage phasing plug housed within the compression driver may be coupled to a horn. The two-stage phasing plug includes first and second phasing plugs. The advantages of havi...
07/04/2006
7012345Electromagnetic motor with flux stabilization ring, saturation tips, and radiator
The present invention provides an electromagnetic drive motor assembly (EDMA) that has an inner flux return assembly formed from an upper pole piece and a lower pole piece oppositely disposed relative to each other along the center of the EDMA. An annularly position...
03/14/2006
6952874Two-stage phasing plug system in a compression driver
This invention provides a two-stage phasing plug located within a compression driver. The two-stage phasing plug housed within the compression driver may be coupled to a horn. The two-stage phasing plug includes first and second phasing plugs. The advantages of havi...
10/11/2005
6801634Loudspeaker coil suspension system
The invention provides a continuous layer of polymer that is shaped to act as the suspension, the former, and an attachment to the diaphragm. The coil may be located within the pocket providing insulation to the coil thus preventing electrical short circuiting of th...
10/05/2004
6774510Electromagnetic motor with flux stabilization ring, saturation tips, and radiator
The present invention provides an electromagnetic drive motor assembly (EDMA) that has an inner flux return assembly formed from an upper pole piece and a lower pole piece oppositely disposed relative to each other along the center of the EDMA. An annularly position...
08/10/2004
 
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