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<div dir="auto">ANR - Active Noise Reduction - indeed does protect hearing. The units vary in sophistication, but all essentially have a microphone in each earcup that "listens" to the sound inside. The circuitry of course knows what it's putting out (assuming this is an actual audio headset and not just a hearing protector) and ignores that. It generates an opposite-phase sound wave to whatever it "hears" as noise, and thus the noise and the ANR signal cancel each other. Your ear received less sound pressure.</div><div dir="auto"><br></div><div dir="auto">I have a pair of Peltor muffs for shooting with microphones in front so that you can speak with someone and still be ready when a shot goes off. They're good, but for mowing the lawn I still turn off the sound from the microphones and they're more quiet.</div><div dir="auto"><br></div><div dir="auto">I also have aftermarket ANR kits I installed in several of my aviation headsets and they're far more effective even for mowing. But the price difference is huge. The Peltor ANR muffs were about $50, while the ANR kits I put in my David Clark headsets cost over $100, on top of a few hundred dollars for the headsets themselves.</div><div dir="auto"><br></div><div dir="auto">David Clark sells headsets with ANR from the factory, but they're over $500, and Bose aviation headsets are about $1,000. Ear plugs are cheaper if they're satisfactory.</div><div dir='auto'><br></div>
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<p style="color: black; font-size: 10pt; font-family: sans-serif; margin: 8pt 0;">On May 29, 2019 5:39:42 PM Jim Stone via Shop-talk <shop-talk@autox.team.net> wrote:</p>
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<span style="color: #0432ff;">"While I'd love to have a pair of Bose Quiet Comfort 20…”</span><div class=""><br class=""></div><div class="">Just for what its worth, I am on my third set of the Bose QC20’s and could not live without them. They work incredibly well, but I don’t know if they qualify as hearing protection. As I understand it, they work by generating anti-noise: the opposite wave length of the noise coming in. While what you can hear is greatly diminished - they are awesome on airplanes and in hotels with noisy HVAC systems - I wonder if they actually prevent hearing damage. It would be nice to know if they do qualify, or if noise+anti-noise is still damaging to the ears, even if you can’t actually perceive it. Does anyone here know? </div><div class=""><div><br class=""></div><br class=""></div>
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