A detailed description of the Federal Bureau of Investigation's techniques to improve the intelligibility of investigative recordings is given, inclouding equipment used, methodology, training of examiners, testimonial procedures, and evidence handling.

Author: Koenig, Bruce E.
Affiliation: Federal Bureau of Investigation, Engineering Research Facility, Lorton, VA
JAES Volume 36 Issue 11 pp. 884-894; November 1988
Publication Date: November 1, 1988

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