Michael H. L. Hecker


  • Research Engineer, Speech Scientist, Independent Consultant


  • PhD in Speech and Hearing Sciences, Stanford University School of Medicine (1974)
  • MS in Electrical Engineering, Massachusetts Institute of Technology (1961)
  • BS in Electrical Engineering, with Honors, Northeastern University (1959)


  • Manager, Commercial Business Development, Applied Control and Signal Processing Group, SRI International, Menlo Park, CA (1990-1995)
  • Senior Behavioral Scientist, Department of Behavioral Medicine, SRI International, Menlo Park, CA (1982-1988)
  • Senior Research Engineer, Sensory Sciences Research Laboratory, SRI International, Menlo Park, CA (1967-1982; 1988-1990)
  • Senior Research Engineer, Sensory Sciences Research Center, Bolt Beranek and Newman Inc., Cambridge, MA (1961-1962; 1965-1967)
  • Independent Consultant in Forensic Acoustics, Los Altos, CA (1974-1995)

Military Service:

  • Promoted to First Lieutenant, US Army Signal Corps (1964)
  • Project Officer, Voice Security Branch, US Army Electronics Research and Development Laboratories, Fort Monmouth, NJ (1962-1964)
  • Participated in ROTC program at Northeastern University (1955-1959)


  • Identified speech behaviors that predict coronary heart disease in a prospective epidemiological study.
  • Participated in a technical examination of presidential tapes during the Watergate investigation.
  • Developed a novel signal-processing algorithm that increases speech intelligibility in a noisy environment.
  • Reviewed the requirements and correct procedures for authenticating magnetic tapes for legal purposes.
  • Measured the effects of task-induced stress on a pilot’s voice during simulated military flights.
  • Served as an expert witness in many legal cases involving a disputed voice identification or a questionable magnetic tape.
  • Listed in Who’s Who in America (1996-2016)
  • Listed in Who’s Who in Science and Engineering (1996-2016)

Professional Societies:

  • Fellow, Acoustical Society of America; Chair, Technical Committee on Speech Communication (1973-1975)
  • Fellow, American Academy of Forensic Sciences
  • Member, American Psychological Association
  • Member, Speech-Language-Hearing Association

Academic Honors

  • Sigma Xi (1974)
  • Tau Beta Pi (1957)
  • Eta Kappa Nu (1956)


  • Principal Scientific Consultant, Speech Evaluation in Medicine and Psychiatry, John K. Darby, MD, ed., Grune & Stratton Inc. (1981)
  • Author, Speaker Recognition: An Interpretive Survey of the Literature, Monograph 16, American Speech and Hearing Association (1971)
  • Author, 25 scientific articles published in professional journals and medical books (1961-1992)


  • Screenwriting
  • Producing short films shown at film festivals (2007-2013)

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