Human Perception, of Humidity Under Four Controlled Conditions

We have studied the subjective perception of humidity and temperature in 48 young male subjects exposed to clean air at 23 C with a relative humidity CRH) of 70%, 50%, 30%, and 10%. We observed no change in the perception of humidity on lowering it from 70% to either 50%, 30%, or 10%, nor on returning it to the initial level of 70%. The decrease and rise in RH did cause highly significant changes in the subjective sensation of temperature although this factor was held constant throughout.