Cardiovascular response patterns and speech: a study of air traffic controllers
P R Henderson1, D A Bakal, B E Dunn
1Department of Psychology, Rehabilitation Center, Ottawa, Ontario, Canada.
Psychosomatic Medicine
|January 1, 1990
Summary
Cardiovascular responses in air traffic controllers (ATCs) were modest during speech tasks. Speech primarily affected blood pressure, not heart rate, which responded more to situational demands.
Area of Science:
- Occupational Health
- Cardiovascular Physiology
- Human Factors Engineering
Background:
- Air traffic controllers (ATCs) experience high-demand work environments.
- Understanding the physiological stress of communication is crucial for ATCs' well-being.
Purpose of the Study:
- To investigate the relationship between speech activities and cardiovascular (CVS) responses in ATCs.
- To differentiate the effects of speech from situational demands on physiological measures.
Main Methods:
- Continuous EKG, ear pulse, and audio recordings were collected from 24 male ATCs during two work sessions.
- Cardiovascular response was assessed using heart rate (HR) and R-wave to ear pulse interval (RPI) for blood pressure estimation.
- Speech and non-speech activities were categorized from audio recordings.
Main Results:
- Overall cardiovascular changes were modest.
- Speech-associated reactivity was observed exclusively in the RPI index (blood pressure), not HR.
- Heart rate changes were primarily linked to situational demands, not speech itself.
Conclusions:
- Speech activities have a subtle impact on ATCs' cardiovascular system, mainly affecting blood pressure.
- Heart rate is a more sensitive indicator of overall situational demand than specific speech tasks.
- Field-based findings may differ from laboratory studies due to communication context and measurement techniques.
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