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2. 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.

3. Hearing protection device - Wikipedia

   en.wikipedia.org/wiki/Hearing_protection_device

   Ear cups are usually lined with a sound-absorbing material, such as foam. The cups should be fit so that the center of the ear canal aligns with the ear canal opening. [1] The soft cushions seal around the pinna of the ears. The head band, centered at the top of the head, applies force/pressure to seal the ear cups over the ears. [1]

4. 15 Best Earmuffs for Winter That Will Keep You Toasty - AOL

   www.aol.com/15-best-earmuffs-winter-keep...

   Here are the best earmuffs and ear warmers for winter to shop in 2023. Foldable Polar Fleece Earmuffs These earmuffs are an Amazon best-seller, with nearly 4,000 5-star ratings.

5. Long-range acoustic device - Wikipedia

   en.wikipedia.org/wiki/Long-range_acoustic_device

   An NYPD LRAD on top of a police humvee An LRAD operator wearing hearing protection LRAD on a navy ship. A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance.

6. 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 ...

7. 15 Best Earmuffs for Winter That Will Keep You Toasty - AOL

   www.aol.com/lifestyle/15-best-earmuffs-winter...

   Your winter wardrobe needs at least one pair of earmuffs. Shop our top picks on Amazon, Walmart and more—from Bluetooth earmuffs to fleece ear warmer headbands.