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David H Griesinger

from Cambridge, MA
Age ~80
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Also known as:
David Hadley Griesinger, David Harriet Griesinger, David M Griesinger, Davi H Griesinger, Dave H Griesinger, Daivd Griesinger, David R, Griesinger Davi, Linda Gallagher
Phone and address:
221 Mount Auburn St, Cambridge, MA 02138
(617) 714-4477
Related to:
Harriet E Griesinger, 84
Connected to:
Amy L Griesinger, 43Cheryl A Griesinger, 69Emily A Griesinger, 70Lynn F Griesinger, 82Richard C Griesinger, 76Tyler A Griesinger, 34William R Griesinger, 66George E Griesler, 83Guy E Griesmann, 71Heather Griesman, 67

David Griesinger Phones & Addresses

  • 221 Mount Auburn St, Cambridge, MA 02138 (617) 714-4477 (617) 864-1968
  • 221 Mount Auburn St APT 107, Cambridge, MA 02138 (617) 945-9571
  • 23 Bellevue Ave, Cambridge, MA 02140 (617) 497-4545 (617) 864-1968
  • 1 Old Wharf Rd, Wellfleet, MA 02667 (508) 349-1973
  • Citrus Springs, FL
  • Parrish, FL
  • 221 Mount Auburn St APT 107, Cambridge, MA 02138 (617) 864-1968

Work

Company: Independent research into acoustics and hearing Jan 2010 Position: President

Education

Degree: Doctorates, Master of Arts, Bachelors, Masters, Doctor of Philosophy, Bachelor of Arts School / High School: Harvard University Specialities: Physics

Skills

Simulations • Digital Signal Processors • Audio Engineering • R&D • Recording • Signal Processing • Acoustics

Industries

Research

Resumes

Resumes

David Griesinger Photo 1

President

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Location:
Cambridge, MA
Industry:
Research
Work:
Independent Research into acoustics and hearing since Jan 2010
President
Harman International Jan 1979 - Dec 2009
Chief Scientist, Harman Specialty Group (Lexicon)
Education:
Harvard University
Doctorates, Master of Arts, Bachelors, Masters, Doctor of Philosophy, Bachelor of Arts, Physics
Skills:
Simulations
Digital Signal Processors
Audio Engineering
R&D
Recording
Signal Processing
Acoustics

Publications

Us Patents

Method And System For Driving Speakers With A 90 Degree Phase Shift

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US Patent:
6683962, Jan 27, 2004
Filed:
Dec 21, 1998
Appl. No.:
09/217770
Inventors:
David H. Griesinger - Cambridge MA
Assignee:
Harman International Industries, Incorporated - Northridge CA
International Classification:
H03G 100
US Classification:
381 97, 381 1, 381 98
Abstract:
A method and system for providing enhanced coupling of a stereophonic pair of full-range loudspeakers or subwoofers to all room modes of a laterally symmetric listening room wherein the preferred location of a listener is on the lateral center line thereof, by applying the left and right audio signals or the low frequency components thereof through a pair of all-pass phase shift networks having an in-phase relationship at higher audio frequencies and an approximately quadrature phase relationship at low audio frequencies where localization is not possible. The method and system may further be compensated by a 3 dB bass boost in each channel to provide the same sound pressure level at low frequencies as would occur with a pair of subwoofers placed together in one comer of the room and driven in phase, thereby ensuring a constant sound pressure level along the lateral center line of the listening room at all audio frequencies.

5-2-5 Matrix Encoder And Decoder System

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US Patent:
6697491, Feb 24, 2004
Filed:
Sep 3, 1998
Appl. No.:
09/146442
Inventors:
David H. Griesinger - Cambridge MA
Assignee:
Harman International Industries, Incorporated - Northridge CA
International Classification:
H04R 500
US Classification:
381 20, 381 18
Abstract:
A sound reproduction system has been developed, for converting signals on two input channels into surround signals on five or seven output channels and vice-versa. A decoder is included which enhances the correlated component of the input signals in the desired direction and reduces the strength of such signals in channels not associated with the encoded direction, while preserving the apparent loudness of all output channels, the separation between the respective left and right output channels and the total energy of the uncorrelated component of the input channels in each output channel. Included within the decoder is a uniquely defined matrix that helps to ensure that the surface of the output signals is smooth and continuous. An encoder is also included which encodes five or seven channels of sound into two so the two channels may be decoded by a variety of decoders with the correct sound direction and level.

5-2-5 Matrix Encoder And Decoder System

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US Patent:
7107211, Sep 12, 2006
Filed:
Oct 17, 2003
Appl. No.:
10/687676
Inventors:
David H. Griesinger - Cambridge MA, US
Assignee:
Harman International Industries, Incorporated - Northridge CA
International Classification:
H04R 5/00
US Classification:
704228, 381 20
Abstract:
A sound reproduction system has been developed, for converting signals on two input channels into surround signals on five or seven output channels and vice-versa. A decoder is included in the sound reproduction system which enhances the correlated component of the input signals in the desired direction and reduces the strength of such signals in channels not associated with the encoded direction, while preserving the apparent loudness of all output channels, the separation between the respective left and right output channels and the total energy of the uncorrelated component of the input channels in each output channel. The decoder may include a uniquely defined matrix that helps to ensure that the surface of the output signals is smooth and continuous.

5-2-5 Matrix Encoder And Decoder System

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US Patent:
7386132, Jun 10, 2008
Filed:
Aug 7, 2006
Appl. No.:
11/499950
Inventors:
David H. Griesinger - Cambridge MA, US
Assignee:
Harman International Industries, Incorporated - Northridge CA
International Classification:
H04S 5/00
US Classification:
381 18, 381 22
Abstract:
A sound reproduction system has been developed, for converting signals on two input channels into surround signals on five or seven output channels and vice-versa. A decoder is included in the sound reproduction system which enhances the correlated component of the input signals in the desired direction and reduces the strength of such signals in channels not associated with the encoded direction, while preserving the apparent loudness of all output channels, the separation between the respective left and right output channels and the total energy of the uncorrelated component of the input channels in each output channel. The decoder may include a uniquely defined matrix that helps to ensure that the surface of the output signals is smooth and continuous.

Discrete Surround Audio System For Home And Automotive Listening

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US Patent:
7443987, Oct 28, 2008
Filed:
Sep 23, 2002
Appl. No.:
10/254031
Inventors:
David H. Griesinger - Cambridge MA, US
Assignee:
Harman International Industries, Incorporated - Northridge CA
International Classification:
H04R 5/00
US Classification:
381 20, 381 1, 381 27
Abstract:
A sound processing system increases the robustness of surround sound in various playback situations. The system may process an incoming signal, such as a five channel surround sound signal, with a first and a second matrix. The first and second matrices produce outputs signals from the input incoming signals. At least one of the output signals may be combined before being sent to the speakers.

Multichannel Downmixing Device

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US Patent:
7450727, Nov 11, 2008
Filed:
May 2, 2003
Appl. No.:
10/429276
Inventors:
David H. Griesinger - Cambridge MA, US
Assignee:
Harman International Industries, Incorporated - Northridge CA
International Classification:
H04B 1/00
US Classification:
381119, 381 80
Abstract:
A method and system are provided for generating one or more mix coefficients for downmixing a multichannel input signal having a plurality of input channels, to an output signal having a plurality of output channels. Mix coefficients may be generated responsive to a comparison of energy between the downmixed (output) signal and the input signal to the downmixer, such that energy and intended direction of the input signal are substantially preserved in the output signal. Further, or in the alternative, the mix coefficient generation may preserve an intended direction of an input signal, for example, received at a surround input channel, in at least one output channel of the output signal. The mix coefficient values may be generated in a test downmixer environment. Additionally, one or more mix coefficients may be generated by retrieving predetermined mix coefficient values. Additionally, or in the alternative, one or more mix coefficients may be generated responsive to an input energy of a plurality of the input channels.

Sound Localization System Based On Analysis Of The Sound Field

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US Patent:
7492908, Feb 17, 2009
Filed:
May 2, 2003
Appl. No.:
10/428366
Inventors:
David H. Griesinger - Cambridge MA, US
Assignee:
Harman International Industries, Incorporated - Northridge CA
International Classification:
H04R 29/00
H04R 1/02
H04R 3/00
H04R 5/00
US Classification:
381 56, 381 58, 381 92, 381 91, 381 18, 381 22
Abstract:
The beginning detection, accommodation and frequency bias properties of the human hearing mechanism have been modeled to create systems that can detect directional transients (“sound events”) in a sound field and localize them. These systems break down a sound field into sound events and non-sound events and separately localize the sound events and non-sound events. Sound events are generally identified according to the frequency bias and beginning detection properties. Once detected, the sound events are generally localized according to differential steering angles (steering angles to which the steady-state signals have been accommodated) or ordinary steering angles, both of which reflect the direction of a sound event indicated during the rise-time of the sound event. When no sound events are detected, non-sound events are localized according to a steering angle that does not reflect rapid motion.

Sound Event Detector System

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US Patent:
7499553, Mar 3, 2009
Filed:
Mar 26, 2004
Appl. No.:
10/810989
Inventors:
David H. Griesinger - Cambridge MA, US
Assignee:
Harman International Industries Incorporated - Northridge CA
International Classification:
H04R 29/00
H04R 5/00
H02B 1/00
US Classification:
381 56, 381 18, 381 19, 381 20, 381123
Abstract:
The beginning detection, accommodation and frequency bias properties of the human hearing mechanism have been modeled to create systems that can detect directional transients (“sound events”) in a sound field and localize them. These systems break down a sound field into sound events and non-sound events and separately localize the sound events and non-sound events. Sound events are generally identified according to the frequency bias and beginning detection properties. Once detected, the sound events are generally localized according to differential steering angles (steering angles to which the steady-state signals have been accommodated) or ordinary steering angles, both of which reflect the direction of a sound event indicated during the rise-time of the sound event. When no sound events are detected, non-sound events are localized according to a steering angle that does not reflect rapid motion.

Wikipedia

LARES

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Dr. David Griesinger and Steve Barbar developed LARES in 1988 while working at ... On April 28, 1992, David H. Griesinger at Lexicon was issued a patent for ...
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David H Griesinger from Cambridge, MA, age ~80 Get Report