Ultrasonics Safety Audible noise levels may be high. Test noise levels at full system operation to determine operator protection requirements. Exposure of bare skin to ultrasonics is harmful. State Information | Glossary | Conversion Checklist | Comments Home | Process Advisor | Alternatives | Links | Search All SAGE material, Copyright© 1992, Research Triangle Institute Last Update: 18 March 1995 sage@rti.org http://clean.rti.org/alt.cfm?id=ul&cat=sa