따라서 115 - 125 dBA 소음 수준정도에서의 작업이 가능하다 현장에서 제공하는 귀마개의 감음율 29dB EX) 1 구역에서 소음이 95dB 일 경우 귀마개 착용시 66dB 로 ... PPT PRESENTATION 청력보존예방교육 PPT PRESENTATION 청각보존예방교육 소음이란 ? ... PPT PRESENTATION 청력보존예방교육 소음의 영향 ① 청력영향 ② 불쾌감 ③ 청각장해 ④ 정신 심리적 영향 ⑤ 신체적 영향 PPT PRESENTATION 청력보존예방교육 소음의
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