Sound Level Testing of the Yokohama Helium-Oxygen Diving Helmet.
Abstract
A helium-oxygen diving helmet manufactured by the Yokohama Diving Apparatus Company, Ltd. of Yokohama, Japan and distributed in the U.S. by J and J Marine Diving Co., was subjected to sound level testing on a specially built acoustical manikin at the U.S. Navy Experimental Diving Unit. Ten manned test dives were also conducted. The sound levels existing in the helmet were found to be into the hearing damage risk levels, but not so far as to preclude normal helium-oxygen diving operations with the helmet. Subject to certain restrictions the sound levels existing in the helmet were judged to be safe for exposures of up to 4 1/2 hours per 24-hour period. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 15, 1973
- Accession Number
- AD0769473
Entities
People
- Stephen D. Reimers
Organizations
- United States Navy Experimental Diving Unit