المستخلص: |
Tense voice is more likely to occur in situations of increased cognitive load. During the interrogation of the criminals under forensic circumstances, the offenders are exposed to some kind of stress (e.g., in the emotions like diffidence, anxiety, fear...) which are reflected in the production of their speech, and consequently, they are good indicators of tense vocalization. The aim of this study is to investigate the phonetic characteristics of stressed/unstressed voice of the crime offenders' speech under pressure and how can these characteristics encode information about the speaker: his emotions and -to some extent-his intentions. Various kinds of videos were collected from T.V interviews with offenders, victims, witnesses. Analyses of acoustic measures; F0, Jitter, Shimmer, H/N and formants were carried on selected items of stressed and unstressed utterances of each criminal. From such analyses, FO seems to be the first factor in priority, followed respectively by the above-mentioned ones.
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