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Most hearing muffs/earplugs have a noise reduction rating of between 22 to 35 NRR. OSHA says, Impulse Noise: The standard states that exposure to impulsive or impact noise should not exceed 14...
Most hearing muffs/earplugs have a noise reduction rating of between 22 to 35 NRR. OSHA says, Impulse Noise: The standard states that exposure to impulsive or impact noise should not exceed 14...