Since 1974, the United States Environmental Protection Agency (EPA) has used the Noise Reduction Rating (NRR) as its yardstick to measure hearing protector
effectiveness in reducing noise levels.
To make it easier to meet the protection requirement, every mortar crewmember is now authorized an "earmuff' hearing protector
headset, NSN 4240-01-538-7970, for $16.95.
Mean elevation errors were subjected to a similar analysis, revealing a significant main effect of hearing protector
, F(2, 10) = 74.20, p [less than] .05.
One being looked at is a combination hard-hat, face protector, hearing protector
and communications package for fire fighters and mine workers.
Each system comes with a projector, cart, tablet, camera, gaming software and one Peltor Sport Tactical 500 electronic Bluetooth hearing protector
OTIS TECHNOLOGY HAS A NEW HEARING PROTECTOR
CALLED THE EAR SHIELD.
The ideal hearing protector
should not block all sound (overprotection), but rather reduce hazardous noise levels while still allowing a worker to hear the sounds that are critical to the job: coworkers, warning signals and equipment maintenance sounds.
Effectiveness of hearing protector
devices in impulse noise verified with transiently evoked and distortion product otoacoustic emissions.
There are two basic approaches to protect product from stray hearing protectors
: the first is to keep the hearing protector
from falling into the product in the first place; and the second is to make it easily detectable if it does.
Three hearing protector
conditions (unoccluded, earplugs, and earmuffs) were combined factorially with three source elevation conditions (upper hemisphere, pen-horizontal region, and lower hemisphere) for a total of nine experimental conditions.
Tying this all together, if you're working with a circular saw screaming at 110 db, you need a hearing protector
rated at 25 NRR or more to bring your ears into the safe range (110 db minus 25 db equals 85 db).
The folks at Peltor have designed some great hearing savers and one of the best is the Peltor Sport Tactical 500 Electronic Hearing Protector
. Rated for 26 NRR, these hearing protectors
feature proprietary 3M SMART technology which suppresses damaging noise above 82 decibels--such as gunshots--while amplifying low-level sounds.