| Summary: | 碩士 === 國立清華大學 === 工業工程與工程管理學系工程碩士在職專班 === 95 === This main purpose of this research is to study the physiological and psychological responses of noise exposure which are lower than the permitted range of regulation, 85 dB(A) in the working area of clean room in a semiconductor factory. Noises are simulated in laboratory and are divided into 4 groups, i.e. 80 dB(A) and 65 dB(A) with high and low frequency. Twenty subjects (10 males and 10 females) were exposed to the noise conditions for one hour to evaluate the physiological responses including blood pressure and pulse. These subjects’ psychological responses in annoyance and physiological fatigue were investigated by questionnaires, then to evaluate the relevance of individual noise sensitivity and subjective feeling. The results indicate that the systolic pressure under exposing 80 dB(A) noise is higher than under exposing 65 dB(A) noise (P<0.001), psychological annoyance under exposing 80 dB(A) noise is greater than under exposing 65 dB(A) noise (P <0.001) and subjective fatigue under exposing 80 dB(A) noise is greater than under exposing 65 dB(A) noise (P <0.001). Also, the effect of noise to human’s fatigue is primarily on difficulty of concentration. The subjective feeling and the systolic pressure is greater with the increase of noise intensity. There is no obvious relationship between the noise frequency and physiological responses and subjective feeling. Thus, in the clean room of a semiconductor factory, only the difference of noise intensity will cause different physiological responses and subjective feeling. The significant correlation between individual noise sensitivity and psychological feeling, indicates that person with higher individual noise sensitivity tend to have greater response in physiological fatigue and psychological annoyance. To improve the quality of working, this research suggests to level down the noise in the clean room of a semiconductor factory to reduce the physiological and psychological noise effect on operators.
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