Pengaruh Pajanan Bising Terhadap Gangguan Pendengaran Tipe Konduktif Pekerj…

MASNIZAR TETRYANTO AZ, 1110247451 : The Effect of Noise Exposure against Conductive Hearing Loss of Welders in Heavy Oil Operation Unit of PT. CPI Duri, Riau. PT Chevron Pacific Indonesia is one of workplaces in Riau Province. Construction and mechanical works apply a lot of welding and grinding machines which could have a negative impact on human and environmental health. The present re…