On 23-24 January 2007, EPA held an informal two day meeting in Washington to discuss revisions to the current hearing protector labeling regulation (40 CFR Part 211, Subpart B). As you may know hearing protectors are rated with a NRR number which is often in the range of 20-30, giving many the impression that the […]

The National Academy of Engineering’s Magazine “Bridge” has published an article on “Engineering Controls” by Bob Bruce. You can see it at [nae.edu].

On 23 January 2007, EPA will start an informal two day meeting in Washington to discuss revisions to the current hearing protector labeling regulation (40 CFR Part 211, Subpart B). As you may know hearing protectors are rated with a NRR number which is often in the range of 20-30, giving many the impression […]