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Test of Bendix Air Filters Used as Mufflers.
NAVY EXPERIMENTAL DIVING UNIT WASHINGTON D C
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Excessive noise, coming mainly from air supply and exhaust lines, has recently become recognized as a serious hazard to hyperbaric chamber personnel. A Bendix air filter no. 057619 was tested by the Navy Experimental Diving Unit as a potential muffler for these systems. The filter was found to produce a 30dbA reduction in the sound level produced by the air supply line in EDUs no. 5 recompression chamber. The filter, being combustible, was, however, judged a fire hazard and work with it has been terminated in favor of work with all metal filters and silencers. Author
APPROVED FOR PUBLIC RELEASE