www.safetyandhealthmagazine.com/articles/sound-meter-3

Sound meter

January 1, 2011
Designed for safety compliance and exposure monitoring, the CEL-620B sound meter digitally measures sound levels in factories and refineries, and at construction sites and other workplaces where noise is a concern. It ensures compliance with government regulations such as OSHA, ACGIH and NIOSH. Up to 100 results can be stored in its internal memory for later retrieval.
Casella USA