<p>In an effort to bring the Noise Reduction Ratings (NRR) of hearing protection devices more in line with real-world usage, the United States Environmental Protection Agency (EPA) will soon announce a proposed new regulation for the labeling of
<p>In an effort to bring the Noise Reduction Ratings (NRR) of hearing protection devices more in line with real-world usage, the United States Environmental Protection Agency (EPA) will soon announce a proposed new regulation for the labeling of