Abstract
The present paper deals with physiological influences of noise on the neuromuscular system. This experiment was carried out upon 18 human beings. They were exposed to noise (113db, 600-800cps), and neuromuscular potentials were measured at 21 muscles before and during exposure by surface electrodes. The following results were obtained : 1) There were some evidences of increments of the neuromuscular tension during exposure to noise in 14.7% of the muscles of 18 individuals. 2) Muscles which responded relatively frequently were M. masseter, M. sacrospinalis and M. gastrocunemius. 3) The responses seemed to appear more frequently in muscles in contraction rather than in resting state. 4) It was suggested that many factors in individual senitivities were contributing to the response.
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