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Joel Charles Edit Profile

analyst , consultant

Joel Charles, American forensic audio and video recording analyst, voice identification consultant. Achievements include development of early rapid form of computerized voice identification, designed first high-speed portable audio cassette duplicator. Member National Association Criminal Defense Lawyers (associate), American Federation Musicians, American Dialect Society, Audio Engineering Society (chairman forensic tape committee).

Background

Charles, Joel was born on January 12, 1914 in Philadelphia, Pennsylvania, United States. Son of Samuel William and Minnie (Fink) Blumenstein.

Education

Bachelor of Science in Chemical Engineering, Drexel University, 1938.

Career

President, The Charles Agency, Philadelphia, 1938-1942, 45-64;physicist, Naval Air Experimental Station, Philadelphia, 1942-1945;president, The Dento-Medical Tapes, Upper Darby, Pennsylvania, 1957-1973;president, Associated television Prodns., Inc., Philadelphia, 1948-1952;president, Computerized Electronic Education, Upper Darby, Pennsylvania, 1969-1973;director continuing education, media instructional methodology, Pennsylvania College of Podiatric Medicine, Philadelphia, 1973-1977;private practice, audio and video tape analysis and voice identificationcons., Plantation, Florida, 1977-1996. Expert witness on tape recordings in over 250 trials. Seminar lecturer Texas Criminal Defense Lawyers Institute, Louisiana Public Defense Criminal Literature Seminar, Broward Criminal Defense Lawyers Association, Dade Criminal Defense Lawyers Association, Phoenix Public Defenders, Dade Federal Public Defenders.

Achievements

  • Achievements include development of early rapid form of computerized voice identification, designed first high-speed portable audio cassette duplicator.

Works

  • Other Work

    • Contributor articles to professional and law journals.

Membership

Member NACDL (associate), National Forensic Center, International Association for ForensicPhonetics, American Federation Musicians, American Dialect Society, Audio Engineering Society (chairman forensic tape committee).

Connections

Married Lillian DuBowe, May 31, 1938 (divorced 1964). Children: Mark Blumenstein, Richard Blumenstein. Married Nancy Sher, October 24, 1988.

father:
Samuel William Blumenstein

mother:
Minnie (Fink) Blumenstein

spouse:
Lillian DuBowe

spouse:
Nancy Sher

child:
Mark Blumenstein Charles

child:
Richard Blumenstein Charles