Abstract
12 subjects were placed under a single loading of 40 Hz pure tone, double loading of 40 Hz pure tone+band noise (1 KHz, 4 KHz) and double loading of 40 Hz pure tone+road noise, and the temperature of their back of hands were measured with time by means of thermography. As a result of comparing changes in dermal temperature, by setting the temperature immediately before loading as 0, with those of control group by loaded sound and subject by the use of analysis of variance, no specific trend was observed in kind of loaded sound, level of sound or emergence of significant change, but large individual differences were observed by subject. From the above results, it was presumed that the uncertain complaint ascribed so far to the sound in low frequency reflects the condition of the autonomic nervous system brought about by sound receiver's psychological and physiological effects rather than the sound in low frequency iteself.
