Document Detail

Voice monitoring to measure emotional load during short-term stress.
MedLine Citation:
PMID:  12111290     Owner:  NLM     Status:  MEDLINE    
It is well known that there is a relationship between the voice the human emotional status. Previous studies have demonstrated that changes of fundamental frequency ( f(0)), in particular, have a significant relationship with emotional load. The aim of the present study was to investigate how f(0) changes in response to an unknown emotionally stressful task under real-life conditions. A further question was whether repetitions of this task lead to an adaptation of f(0), indicating a lower emotional load. The participants of this study included 26 healthy males. f(0) and heart rate ( f(c)) were recorded for baseline testing (BLT) under relaxed laboratory conditions. Then the participants were asked to negotiate a natural obstacle by way of sliding down a rope hanging from a handlebar without any safety provisions, thus being exposed to the danger of a fall from a height of up to 12 m into shallow water (guerrilla slide I, GSI). The task was repeated after 30 min (GSII) and after 3 days of physical strain (GSIII). Immediately before starting the task the participants were asked to give a standardised speech sample, during which f(c) was recorded. The mode value of f(0) ( f(0,mode)) of the speech samples was used for further analysis. The mean (SD) value of f(0,mode) at BLT was 114.9 (14.8) Hz; this increased to 138.8 (19.6) Hz at GSI ( P<0.000), decreased to 135.9 (19.6) Hz at GSII and to 130.0 (21.5) Hz at GSIII ( P=0.012). The increase in f(c) was significantly different from BLT to GSI ( P<0.000). The repetitions of the task did not produce significant changes in f(c). It was shown that f(0,mode) is a sensitive parameter to describe changes in emotional load, at least in response to short-term psychoemotional stress, and seems to throw light upon the amount of adaptation caused by increased experience.
Peter Wittels; Bernd Johannes; Robert Enne; Karl Kirsch; Hanns-Christian Gunga
Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't     Date:  2002-05-28
Journal Detail:
Title:  European journal of applied physiology     Volume:  87     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2002 Jul 
Date Detail:
Created Date:  2002-07-11     Completed Date:  2003-02-12     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  278-82     Citation Subset:  IM    
Forschungsgruppe Leistungsmedizin, Heeresspital, Brünnerstrasse 238, A 1210 Wien, Austria.
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MeSH Terms
Fourier Analysis
Heart Rate*
Inservice Training
Military Personnel
Physical Education and Training
Reproducibility of Results
Sensitivity and Specificity
Signal Processing, Computer-Assisted
Sound Spectrography / methods
Statistics as Topic
Stress, Psychological / physiopathology*,  psychology*
Verbal Behavior*
Voice Quality*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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