����� applying active noise control
����� HVAC acoustics
����� passive muffler modeling
����� aircraft headset design
����� DSP programming (Motorola and Analog Devices fixed point DSP's)
����� Windows C++ programming
����� acoustical modeling of cellular phones
����� acoustical modeling of 2-way radios ("walkie talkies")
����� modeling of porous acoustic sound absorbing materials (foams, felts)
����� modeling of dynamic MEMS devices
�����
Weston, FL
[email protected]
EXPERIENCE
Motorola, Inc.
Ft. Lauderdale FL�� April 1998 to present
Principle staff engineer with Motorola's Acoustic Technology Center
Main responsibility is to provide acoustical technical expertise to product groups across the company
Developed a novel mathematical model for loudspeaker parameterization called "extended parameters" that extends what can be modeled with classic Thiele-Small parameters.
Wrote a GUI equivalent circuit modeling program in the MATLAB environment called MARS (Motorola Acoustic Response Simulator) which is widely used across the company and is Motorola's main acoustical modeling tool.
Worked extensively to develop and document suite of lab measurement procedures, fixtures, and software for measuring: acoustical impedance, material flow impedance, bulk modulus of air in porous materials, parameterize micro-speakers, characterize micro-speaker's response, and perform polar response measurements.� Several sites at Motorola facilities now use this apparatus and software for performing acoustical measurements.
Frequently provide technical support to product groups when design issues arise.
Telex Communications, Inc.
Bloomington MN�� April 1996 to April 1998
Principle acoustical research and development engineer.
Performed R&D for new product concepts for Telex's Computer Audio and Acoustic Products groups.
Developed MS Windows program which models the acoustics of headsets, including active noise control, for improved headset designs and for maintaining of a core competency.
Conceived of, prototyped and brought to market battery operated DSP based active noise control aviation headset.
Continuing to work toward improving engineering environment through an improved electronics lab, engineering library and engineering seminar presentations.
Nelson Industries
Stoughton WI�� January 1995� to April 1996
Digisonix Inc. (subsidiary of Nelson Industries)
Middleton, WI�� April. 1992 to December 1994
Acoustical design engineer.
Designed acoustical systems for active noise control.��
Wrote MS Windows modeling programs for use as general engineering tools for modeling speaker enclosures (WinSpk), complex acoustical systems (PModes), and active control performance analysis tool (Octave).��
Performed acoustical analysis, modeling and applied active noise control to automobile exhaust systems, rectangular HVAC ducts, and large cylindrical silencers.��
Discovered and modeled the physical process behind poor low frequency sensor performance found in all rectangular HVAC duct which inhibited active noise control.
Transferred to Nelson Industries? Corporate Research to develop a MS Windows muffler/silencer modeling program for general design use and also provide division wide support for Nelson Industries acoustical engineering needs.��
University of Minnesota
Minneapolis, MN�� March 1987 to Mar. 1992
Graduate research assistant at the Acoustic Research Laboratory.��
Studied sound propagation in and above porous material.��
Designed and constructed automated data acquisition systems including RS232 and HPIB (IEEE-488) interfaces, stepper motor controller, and analog multiplexing.�
Developed complex and matrix C++ classes for data and numerical analysis.�
Breamar Corporation
Burnsville, MN�� December� 1984 to March 1986
Student intern.
Designed and constructed prototype digital and analog circuits, worked with production personnel to ensure quality of magnetic heads, and worked as a service technician.��
EDUCATION
Ph.D., Electrical Engineering� January 1993
University of Minnesota
Emphasis:� physical acoustics, fluid dynamics, numerical analysis
Thesis title: "Sound Propagation Over Ground Excited by a Spherical Acoustic Source"
M.S.E.E, Electrical Engineering� January 1989,
University of Minnesota
Emphasis: physical acoustics, magnetics and magnetic materials
Thesis title: "Nonlinear Wave Propagation Through Rigid Porous Media"
B.S.E.E., Electrical Engineering� Mar. 1987
University of Minnesota
Emphasis: analog electronics, field and wave theory, general mathematics�
COMPUTER SKILLS
programming:
C & C++, MS Windows applications in C++, 6502 assembly, Pascal, MATLAB, Motorola 56000 family DSP's, Analog Devices 2100 family DSP's, HP 2 and 8 channel spectrum analyzers in HP Basic and via MS Windows DDE.
applications:
Visual C++, Borland C++, Matlab, MathCad, MS Word, Excel.�
PUBLICATIONS�
David K. Wilson, Jason D. McIntosh, and Robert F. Lambert, "Forchheimer-type nonlinearities for high-intensity propagation of pure tones in air-saturated porous media,"� The Journal of the Acoustical Society of America, 84(1), July 1988, pgs. 350-359.�
Jason D. McIntosh, "Surface phenomena of finite-amplitude, pure tone sound on air-saturated porous materials," Journal of the Acoustical Society of America, Supplement 1 85, S114, 1989.�
Jason D. McIntosh, Michael T. Zuroski, and Robert F. Lambert, "Standing wave apparatus for measuring fundamental properties of acoustic materials in air," The Journal of the Acoustical Society of America, 88(1), October 1990, pgs. 1929-1938.�
Jason D. McIntosh and Robert F. Lambert, "Nonlinear wave propagation through rigid porous materials.� I: Nonlinear parameterization and numerical solutions," The Journal of the Acoustical Society of America, 88(1), October 1990, pgs. 1939-1949.�
Robert F. Lambert and Jason D. McIntosh , "Nonlinear wave propagation through rigid porous materials.� II: Approximate analytical solutions," The Journal of the Acoustical Society of America, 88(1), October 1990, pgs. 1950-1959.�
Jason McIntosh, "A simple apparatus for measurement of the acoustical impedance of membranes, plates and the bulk properties of porous materials,"� The Journal of� the Acoustical Society of America, Supplement 1 94(3), September 1993, pg. 1858.�
PROFESSIONAL INTERESTS
Physical acoustics and wave phenomena, vibration, circuit design, mathematics with an emphasis in numerical solutions, magnetics and field phenomena.� I also have a strong interest in programming, including Widows C++ and DSPs.