The influence of vibration on seated human drowsiness

Azizan, M, Fard, M, Azari, M, Benediktsdottir, B, Arnardottir, E and Maeda, S 2016, 'The influence of vibration on seated human drowsiness', Industrial Health, vol. 54, no. 4, pp. 296-307.


Document type: Journal Article
Collection: Journal Articles

Title The influence of vibration on seated human drowsiness
Author(s) Azizan, M
Fard, M
Azari, M
Benediktsdottir, B
Arnardottir, E
Maeda, S
Year 2016
Journal name Industrial Health
Volume number 54
Issue number 4
Start page 296
End page 307
Total pages 12
Publisher Roudou Anzen Eisei Sougou Kenkyujo, National Institute of Occupational Safety and Health, Japan
Abstract Although much is known about human body vibration discomfort, there is little research data on the effects of vibration on vehicle occupant drowsiness. A laboratory experimental setup has been developed. Vibration was applied to the volunteers sitting on the vehicle seat mounted on the vibration platform. Seated volunteers were exposed to a Gaussian random vibration, with 1-15 Hz frequency bandwidth at 0.2 ms(-2) r.m.s., for 20-minutes. Two drowsiness measurement methods were used, Psychomotor Vigilance Test (PVT) and Karolinska Sleepiness Scale (KSS). Significant changes in PVT (p<0.05) and KSS (p<0.05) were detected in all eighteen volunteers. Furthermore, a moderate correlation (r>0.4) was observed between objective measurement (PVT) and subjective measurement (KSS). The results suggest that exposure to vibration even for 20-minutes can cause significant drowsiness impairing psychomotor performance. This finding has important implications for road safety.
Subject Public Health and Health Services not elsewhere classified
Keyword(s) Human vibration
Ride comfort
Drowsiness
Sleepiness
Psychomotor-vigilance test (PVT)
Karolinska sleepiness scale (KSS)
DOI - identifier 10.2486/indhealth.2015-0095
Copyright notice © 2016 National Institute of Occupational Safety and Health
ISSN 0019-8366
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