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Thermal Perception of Ventilation Changes in Full-Face Motorcycle Helmets: Subject and Manikin Study

Bogerd, Cornelis P. ; Rossi, René M. ; Brühwiler, Paul A.

In: Annals of Occupational Hygiene, 2011, vol. 55, no. 2, p. 192-201

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    Titre
    • Thermal Perception of Ventilation Changes in Full-Face Motorcycle Helmets: Subject and Manikin Study
    Auteur
    • Bogerd, Cornelis P.. Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Protection and Physiology, Lerchenfeldstrasse 5, CH-9011 St Gallen, Switzerland
    • Rossi, René M.. Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Protection and Physiology, Lerchenfeldstrasse 5, CH-9011 St Gallen, Switzerland
    • Brühwiler, Paul A.. Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Protection and Physiology, Lerchenfeldstrasse 5, CH-9011 St Gallen, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Annals of Occupational Hygiene, 2011, vol. 55, no. 2, p. 192-201. Oxford University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:289268
    Summary
    We report the effects of full-face motorcycle helmet ventilation systems on heat, airflow, noise, and comfort perception for ventilation changes on the scalp. Eight subjects (aged 28.0 ± 5.4 years) underwent two experimental trials at ambient temperatures of 23.7 ± 0.4°C or 27.5 ± 0.3°C. In each trial, the thermally equilibrated subjects underwent two examination phases, during which four different helmets were assessed at wind speeds of 39.2 ± 1.9 km h−1 and 59.3 ± 1.4 km h−1. Vent-induced heat loss in the scalp ranged from −6.1 to 6.1 W, corresponding to vents being closed or opened, respectively. Perception of vent-induced changes was assessed immediately after the change. We find that the vent-induced heat loss, the subject, and the helmet are the most important response factors. In addition, comparison of two helmets with similar vent-induced heat loss suggests that internal airflow patterns may be important in explaining the observed perception differences