Estimating Noise Levels within Dry Diving Helmets Due to External Sources

摘要

Data obtained from the Naval Coastal Systems Center was analyzed to determine what sound levels exist within current U.S. navy diving helmets when divers are exposed to intense waterborne noise. Other research was reviewed to establish similar relationships for other diving systems that are of interest to the U.S. Navy. The results indicate that features of helmet construction (materials and shape) affect the transfer of sound from water to within helmets. A single medically conservative transfer function was identified that may be applied on an interim basis to current U.S. navy diving helmets. Additional research that needs to be accomplished to develop more adequate transfer characteristics is outlined. Keywords: Noise exposure; Hyperbaric environments; Hearing conservation; Diver equipment; Protective clothing; Exposure(Physiology). (SDW)