16 May 2012 Visualizations by acoustics of voice stress: Is there an optical mucosal wave correlate?
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Abstract
We present data on how stress is manifested in the human voice by analyzing acoustic and phonetic structure of life recordings from police 997 emergency call center number in Poland. From the data corpus comprising thousands of authentic Police 997 emergency phone calls, a few hundred were automatically selected according to their duration selection criteria (calls shorter than 3-4 seconds were omitted), and finally from this corpus, voices of 45 speakers were chosen for acoustic analysis and were contrasted to neutral samples. Statistical measurements for stressed and neutral speech samples showed relevance of the arousal dimension in stress processing. The MDVP analysis confirmed statistical significance of following parameters in voice stress detection: fundamental frequency and pitch variation, noise-to-harmonic-ratio, sub-harmonics and voice irregularities. In highly stressful conditions a systematic over-one-octave shift in pitch was observed. Linear Discriminant Analysis based on nine acoustic features showed that it is possible to categorize the speech samples into one of the following classes: male stressed or neutral, or female stressed or neutral.
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G. Demenko, G. Demenko, M. Jastrzebska, M. Jastrzebska, Krzysztof Izdebski, Krzysztof Izdebski, Yuling Yan, Yuling Yan, "Visualizations by acoustics of voice stress: Is there an optical mucosal wave correlate?", Proc. SPIE 8207, Photonic Therapeutics and Diagnostics VIII, 82072M (16 May 2012); doi: 10.1117/12.916778; https://doi.org/10.1117/12.916778
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