Лебедева Н.Н., Потапова Р.К., Каримова Е.Д., Вехов А.В., Казимирова Е.А. «Акустические характеристики речевого сигнала и психофизиологические корреляты различных эмоциональных состояний в модельных экспериментаХ» Биомедицинская радиоэлектроника, № 12, с. 35-42 (2013)

Представлены результаты исследования нелинейной характеристики речевого сигнала – корреляционной размерности D2 – и её связи с электрографическими и психофизиологическими характеристиками человека в экспериментах по моделированию различных эмоциональных состояний. Показано, что величина D2 уменьшается при моделировании стенических эмоций, увеличивается – при моделировании астенических; при этом выраженность динамики определяется гендерным признаком, уровнями экстраверсии-интроверсии и нейротизма, а также мощностью альфа-ритма в спектре электроэнцефолограммы испытуемых. The main aim of our work was studying the non-linear characteristic of voice signal in perspective of verification of people emotional condition and an impact, individual psychophysiological features have on this characteristic. It was studied in model experiment, during which each participant should plunge in each emotional states and then read four sentences. We recruited twenty two people in experiment – twenty non-actor (10 men, 10 women) and two professional actors (man and woman). There were five states: neutrality, happiness, anger, sorrow and fear. We obtained the non-linear characteristic D2 of voice signal. In order to identify individual psychophysiological profile for each participant, ECG-recording, psychological tests (including Eysenck’s test) and EEG-recording were used. Non-actors and actors results comparing have shown, that typical D2 dynamic is decrease during happiness and anger for all participants; but in sorrow and fear states D2 slightly increase for women and extroverts and decrease for men and introverts. These trends for Professional actors were more remarkable but non-actors also demonstrated the same. So, dynamic for D2 of women is similar to extroverts and of men is similar to introverts. In addition to measuring the level of introversions and extraversions, the level of neuroticism were measured as well. It has been shown, that people with high level of this factor demonstrated higher meanings of D2. It must be considered, that the majority part of this group was formed by women. After the division of all participants into several groups according their alpha-rhythm capacity we found out that D2 of people with ulterior rhythm changed hardly noticeable between different emotional states. For groups with alpha-rhythm varying degrees of capacity, value of D2 depends on the level of neuroticism. Besides the level of neuroticism influenced on the ratio of D2 values between different emotional states. In addition, five experts were offered all audio files for marking. According to the expert estimate, the most successful modeling was demonstrated by people with high level of extraversion and neuroticism at once. But for all that, experts could not make out emotion, which had right dynamic of D2. We may conclude that use non-linear voice characteristic may be more successful than expert estimation, at least for emotion directed outward (happiness, anger).