Blast Ninja is a next-generation abrasive blast nozzle that significantly reduces noise exposure at the source. The proprietary technology leverages years of aero-acoustic research conducted on jet engine noise reduction and was created in partnership with the U.S. Air Force and Office of Naval Research. OSHA Advantage - Longer Blast Times At 115 dB, the average volume of abrasive blasting operations, OSHA regulations allow for just 15 minutes of exposure. In certain conditions, Blast Ninja can meet OSHAs noise standard compliance 29 CFR 1910.95 of four hours of exposure. Per OSHA requirements, better hearing protection does not reduce worker noise exposure. Only by reducing sound at its source will a worker experience non-hazardous noise.