Ingressive Psychological Techniques in the Audio Analysis of Mimicry Voice

Abstract

Forensic sciences, as a field is an amalgamation of various different fields; that all work complimentary to each other. However, with the recent advancements in the fields of Auditory Analysis and Deception Detection Techniques, it has been seen that usage of complimentary techniques is an aspect of forensics that needs a far more focused approach; for a multidisciplinary approach always looks at the issue from several angles and strives for a solution. In the current study, the authors have attempted to understand the complimentary integration of two different analytical techniques, forensic psychology and audio forensics, on the issue of voice disguise by mimicry. For Auditory analysis, Phonetic analysis of the mimicked and natural speech samples of the mimicry artist, was used to establish the similarities of the speaker. At the same time, the Deception Detection Techniques of Layered Voice Analysis (LVA), Polygraph and Brain Electrical Oscillation Signaling (BEOS) were used to determine the deception patterns within the emotional, psycho – physiological and neurological analysis of the mimicry artists w.r.t. the samples of mimicry artist in their normal and disguised voice when in comparison with the target voice sample. The results were analyzed and discussed from a forensic perspective. Conclusions regarding the implications of the complimentary usage of audio forensics and forensic psychological techniques proposed the admission of psychological evidences in addition to auditory analysis evidence to the judicial system.