A Prototype Helium-Oxygen Diving Helmet was subjected to sound level testing on a specially built acoustical manikin at the U.S. Navy Experimental Diving Unit. The helmet was tested in both the semi-closed circuit (venturi) and open-circuit modes. The sound levels existing in the helmet were found to be well into the hearing damage risk levels during all test conditions.
Sound Level Testing of the DESCO Prototype Helium Oxygen Helmet
1973
35 pages
Report
Keine Angabe
Englisch
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