The National Institute for Occupational Safety and Health (NIOSH), in
partnership with stakeholders in the mining and surface drilling industries,
conducted research to develop engineering control technologies that reduce
workplace noise exposure. The result of this research partnership is the
development of a partial cab.
The partial cab shields the operator from noise and reduces sound levels
significantly. It is fitted to the drill rig with a solid steel frame.
Previous studies showed that operators of noncab surface drill rigs are
overexposed to noise. These rigs are used in various surface drilling
industries, including mining and construction. Many surface rigs do not have
full cabs as a result of the original equipment manufacturer design or the
prohibitive cost of aftermarket products.
Noise-induced hearing loss (NIHL) continues to be an occupational health
problem in the U.S. mining industry. Hearing loss data suggest that by age 50,
nearly 90% of coal miners have a hearing impairment. This compares to 10% for a
general population of non-exposed males.
AplusA-online.de - Source: National Institute for Occupational Safety and Health (NIOSH)