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2. Hearing protection device - Wikipedia

   en.wikipedia.org/wiki/Hearing_protection_device

   Various earmuff hearing protectors. Sound levels of some daily activities. 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. Earmuffs - Wikipedia

   en.wikipedia.org/wiki/Earmuffs

   Two people wearing behind-the-neck earmuffs. Thermal earmuffs are worn for protection from the cold. Because the ears extend from the sides of the head to gather sound waves, they have a high skin surface-area-to-volume ratio, and very little muscle tissue, causing them to be one of the first body parts to become uncomfortably cold as temperatures drop.

4. Chester Greenwood - Wikipedia

   en.wikipedia.org/wiki/Chester_Greenwood

   Chester Greenwood (4 December 1858 – 5 July 1937) was an American engineer and inventor, known for inventing the earmuffs in 1873. [1] He reportedly came up with the idea while ice skating and he asked his grandmother to sew tufts of fur between loops of wire. [2]

5. The 13 Best Earmuffs to Up Your Winter Accessory Game - AOL

   www.aol.com/lifestyle/13-best-earmuffs-winter...

   Shearling Ear Muffs. gucci.com. $620.00. x Fulsap Printed Earmuffs. The cold weather collab that we've all been waiting for is here, in a link-up between Pucci and the winter gear experts at Fulsap.

6. Dog Behaviorist Explains How To Help Pups Cope with Fireworks ...

   www.aol.com/dog-behaviorist-explains-help-pups...

   Dog Ear Muffs for Noise Protection by Famikako . Happy Hoodie Calming Band For Dogs and Cats . Beware of the heat: If you’re spending time outside with your pup, make sure you are watching them ...

7. 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 ...