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NASA CR-132424 ENVIRONMENTAL CRITERIA FOR HUMAN COMFORT - A STUDY OF THE RELATED LITERATURE Final Report Grant No. NGL-47-005-I 5 I S.ubmitted to: National Aeronautics and Space Administration Office of Scientific and Technical Information Code US Washington, D. C. 20516 Submitted by: Ira D. Jacobson ( NASA-CR-132424 >) ENVIBONHENTAL CBITERIA N74-21736 FOB HOHAN CCMFOBT. A S10DI OF THE RELATED LITEBA1URE Final Report | (Virginia Dniv.) 113 p HC $8.75 Unclas V CSCL 05E G3/05 37050 Research Laboratories for The Engineering Sciences SCHOOL OF ENGINEERING AND APPLIED SCIENCE UNIVERSITY OF VIRGINI A CHARLOTTESVILLE, VIRGINIA } t Report No. BE-4088-I 0 I-74 February I974 C°PYNo '- ACKNOWLEDGEMENTS The editor wishes to acknowledge the contributions of the many students in the Department of Psychology, Biomedica Engineering and Engineering Science and Systems whose work contributed to this compendium. In particular, thanks are due to Edward Rinalducci for his direction of many of those students efforts. INTRODUCTION This document represents a compendium of information on literature surveys of human reaction to aircraft environmental variables conducted by the University of Virginia during the period January 1971 through June 1973. The data presented has for the most part been extracted from existing in-house and memoranda reports. The variables considered are motion, noise, temperature and pressure. The report is broken down into chapters for each of the environmental variables and criteria proposed based on the existing literature. i i CHAPTER I Mot ion A. Genera I The effect of motion (linear acceleration, angular rotation and angular acceleration) on humans can be classi- fied into three general areas--effects on performance, effects on subjective comfort, effects on motion sickness. These are purposely treated seperately since the ranges of motion which begin to have an effect in each of these areas, can be, and usually are, different. For a commercial vehicle environment, one is not interested in pushing toward the upper limits of degradation in any of these areas, and, since the degradation of comfort occurs prior to the onset of motion sickness, that area will be emphasized. Effects on performance have gotten much attention and these are well summarized in the Bioastronautics Data Handbook (1973) and Grether, 1971. This document will cover the.area of subjective comfort. B. Selected Experiments The information displayed in the accompanying table is meant to give the reader a ready reference to the type of testing that has been done in the laboratory and in the field on subjective response to motion. This list is highly selective, but does represent a cross section of the experiments done to date. As can be seen from the table, most of the work has been done in the frequency range of 1-30 hz with the input being sinusoidal and in the vertical direction. The first ten investigators did laboratory simulations while the last three did field testing. The details and results of these tests can be obtained by referring to the original articles or one of the review articles indicated. Normally two references are given, an indirect reference(s) which refers to the review article(s) in which the data appeared, and a direct reference which indicates the original reporting of the work. Complete citations are given in the bibliography. ORIGINAL PAGE .IS OF POOR QUALITY >- — Q. in cn C VI i 4) ft) •X ^ >.— . L. "i 0 en O — E »*- en to M 4) _ — «) r^- "4") Q w U CD 10 O* Ot Ot O* O — »_ — c i- c f- .0 a> E c <o II »- <ft CM co moo tn Q <D I U O UJ C 1 2 •o ** tn *-* O O CM • • in — o .- 4) C *O tn — O — "4- Q. 3 l- vi *> — 3 <0 g,S^ X — I l" 1* 1 I ft) 4-» uS >. 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