MIL-HDBK-1110
13.7.4.1 Ear Muffs. Ear muffs come in a variety of styles.
Most have spring-loaded head bands to secure them in place
covering the entire ear. Ear muffs can reduce noise levels by 15
to 30 decibels.
13.7.4.2 Ear Plugs. Ear plugs of deformable rubber or plastic
materials are positioned in the outer part of the ear. Ear plugs
may be disposable or reusable. The latter should be cleaned and
properly stored after use.
13.7.4.3 Canal Caps. Canal caps (headband plugs) close off the
ear canal at its opening. A flexible headband ensures a close
fit. Canal caps must also be cleaned and properly stored after
use.
13.7.5
Safety Shoes. About 12,000 accidental foot injuries
occur each year. Steel-reinforced shoes are designed to protect
feet from common machine accidents - falling or rolling objects,
cuts, and punctures. The entire toe box and insole are
ordinarily reinforced.
Safety boots offer more protection from splash.
Neoprene or nitrile boots are often required when handling
caustics, solvents, or oils. Quick-release fasteners may permit
speedy removal in case a hazardous substance gets in the boot.
Slip-resistant soles are required for both shoes and boots, if a
slip hazard is present.
13.7.6
Respirators/Ventilation. Respiratory hazards can be
minimized by a good ventilation system. Note that respiratory
protection is considered a secondary line of defense to protect
the worker when ventilation cannot control exposures.
a) Further protection can be provided by one of the
following types of respirator:
(1) Disposable dust masks/filters (fiber masks
over nose and mouth filter particulates)
(2) Half masks - fits over nose and mouth;
cartridges absorb or trap the contaminate; select the appropriate
cartridge for the particulate (dust) or vapor
(3) Full face mask (they also protect eyes and
face; vapors absorbed by canisters or cartridges; may also have
dust filter)
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