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February 9, 1957


JAMA. 1957;163(6):472. doi:10.1001/jama.1957.02970410062020

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Noise and the Conservation of Hearing.—  The Air Force Medical Service, with the help of the Armed Forces— National Research Council committee on hearing and bioacoustics and others, has developed criteria for evaluating exposures to noise on a time and intensity basis so as to calculate the probable degree of damage, as is done for ionization radiation. It established the policy of securing a base-line audiogram for all personnel of the Air Force and the requirement of periodic surveys of the hazardous noise areas of an installation. The Air Force provides for delineating the area, both on the ground and on survey maps, where personal protective devices should be worn, as well as indicating the type of device furnishing adequate protection. It provides for periodic follow-up on all personnel employed in these designated areas. Personnel showing a shift in their hearing threshold will be studied to determine if

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