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2. Hearing protection device - Wikipedia

   en.wikipedia.org/wiki/Hearing_protection_device

   A hearing protection device, also known as a HPD, is an ear protection device worn in or over the ears while exposed to hazardous noise and provide hearing protection to help prevent noise-induced hearing loss. HPDs reduce the level of the noise entering the ear.

3. Earplug - Wikipedia

   en.wikipedia.org/wiki/Earplug

   Using both ear muffs (whether passive or active) and earplugs simultaneously results in maximum protection, but the efficacy of such combined protection relative to preventing permanent ear damage is inconclusive, with evidence indicating that a combined noise reduction ratio (NRR) of only 36 dB (C-weighted) is the maximum possible using ear ...

4. Ear protection - Wikipedia

   en.wikipedia.org/wiki/Ear_protection

   Ear protection may pertain to protecting the ear from cold, intrusion by water or debris, or noise. It may refer to: Hearing protection device; Earplug; Earmuffs

5. Why do my ears feel clogged? 5 Things you can do right now. - AOL

   www.aol.com/why-ears-feel-clogged-5-000000206.html

   - Fluid in the ear - Noise damage . ... If you work in a noisy environment, wear appropriate hearing protection that properly fits your ears. If you have experienced noise-induced hearing loss ...

6. Hearing protection fit-testing - Wikipedia

   en.wikipedia.org/wiki/Hearing_protection_fit-testing

   Hearing protector fit-testing is a method that measures the degree of noise reduction obtained from an individual wearing a particular hearing protection device (HPD) - for example, a noise canceling earplug or earmuff. Fit testing is necessary due to the fact that noise attenuation varies across individuals.

7. Are Noise-Canceling Headphones Harmful to Your Ears? - AOL

   www.aol.com/noise-canceling-headphones-harmful...

   Noise canceling headphones can help keep your volume within a safe range, so you don’t have to crank up volume to hear ‘over’ the noise. And while over-the-ear headphones can help close off ...