Evaluation of a Water-Cooled Helmet Liner
Abstract
Five subjects completed four 80 minute heat exposures (46C (115F), 40% relative humidity), twice wearing the water-cooled helmet liner and twice without for a total of 20 heat exposures. During the thermal exposure, the subjects accomplished psychomotor performance tests. Physiological measurements included mean skin, rectal, and body temperatures, mean heart rate, body heat storage, sweat loss, and Physiologic Index of Strain. The performance measurements included tracking, mental arithmetic, visual-motor response time, and auditory differentiation tasks. Head cooling significantly reduced the magnitude of all the physiological responses. The effect of head cooling on psychomotor performance was less impressive. The overall results indicate a lack of performance decrement as a result of the heat loads used here and no differential effect of head cooling on a subject's performance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1974
- Accession Number
- ADA004776
Entities
People
- Abbott T. Kissen
- David C. Smedley
- Robert D. O'donnell
- Walter C. Summers
- Willi J. Buehring
Organizations
- Air Force Research Laboratory