A method for real-time detection of psychological stress state during speech using heart rate measurement

Abstract

A method for real-time detection of psychological stress state during speech by heart rate measurement, including the collection of electrocardiographic signals, the location of R waves, the calculation of heart rate, the calculation of respiratory sinus arrhythmia index, the calculation of heart rate variation index and the mean value of heart rate calculation. In the state of non-strength exercise, there is a short mean value of the RR interval and a small heart rate variability, and (or) the RR interval continuously becomes longer or shorter in adjacent cycles caused by shallow and slow breathing, suggesting The speaker is in a state of psychological stress. In particular, the continuous lengthening or shortening of adjacent RR intervals that occur several times only during speech usually indicates that the speaker is in a state of weak psychological stress; the first two features above or all three features appear at the same time , it indicates that the speaker is in a state of strong psychological stress; if the above three characteristics do not appear, it indicates that the speaker has no psychological stress. By detecting small RR interval mean value, small heart rate variability, and sinus arrhythmia index caused by shallow and slow breathing, using empirical threshold method or classical classifier, a real-time detection of psychological stress state during speech is obtained Methods.

Description

technical field [0001] The invention relates to a method for real-time detection of psychological stress state during speaking by using heart rate measurement. Background technique [0002] The long-term existence of psychological stress may lead to various physical damages, such as decreased immunity and induction of cardiovascular diseases. In the literature, by means of statistical and hypothesis testing methods, it has been confirmed that psychological stress leads to the following responses of the cardiac autonomic nervous system: sympathetic activation and parasympathetic inhibition. The above-mentioned autonomic nervous stress response is reflected in the RR interval by shortening the RR interval and reducing the variation rate of the RR interval sequence. Despite the above-mentioned conclusions, the ECG signal characteristics used to detect psychological stress are still in the laboratory research stage, and baseline characteristics are usually used as a reference t...

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Problems solved by technology

Despite the above-mentioned conclusions, the characteristics of ECG signals used to detect psychological stress are still in the laboratory research stage, and baseline characteristics are usually used as a reference to identify the state of psychological stress, and there is a lack of baseline characteristics suitable for real-time psychological stress detection method of information

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