42 C.F.R. § 84.140 Air velocity and noise levels; hoods and helmets; minimum requirements.
Title 42 - Public Health
Noise levels generated by the respirator will be measured inside the hood or helmet at maximum airflow obtainable within pressure and hose length requirements and shall not exceed 80 dBA.
Title 42: Public Health
PART 84—APPROVAL OF RESPIRATORY PROTECTIVE DEVICES
Subpart J—Supplied-Air Respirators
§ 84.140 Air velocity and noise levels; hoods and helmets; minimum requirements.
