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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. HPDs can also protect against other effects of noise exposure such as tinnitus and ...

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

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

   Faux Beaver Fur Earmuffs. This pair of earmuffs is a great option for easing into the trend. Take your pick from four faux furry hues, and channel peak winter warmth. Materials: Acrylic, polyester ...

4. Earmuffs - Wikipedia

   en.wikipedia.org/wiki/Earmuffs

   Earmuffs refer to two different items. Both items consist of a thermoplastic or metal head-band that fits over the top or back of the head, and a cushion or cup at each end to usually cover both ears. The cups can either be clothing accessories designed to cover a person's ears for warmth or personal protective equipment designed to cover a ...

5. 12 Earmuffs to Keep You Warm (and Stylish) On the ... - AOL

   www.aol.com/lifestyle/12-earmuffs-keep-warm...

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6. Edwin Howard Armstrong - Wikipedia

   en.wikipedia.org/wiki/Edwin_Howard_Armstrong

   Edwin Howard Armstrong (December 18, 1890 [2] – February 1, 1954 [3]) was an American electrical engineer and inventor, who developed FM ( frequency modulation) radio and the superheterodyne receiver system. He held 42 patents and received numerous awards, including the first Medal of Honor awarded by the Institute of Radio Engineers (now ...

7. In-ear monitor - Wikipedia

   en.wikipedia.org/wiki/In-ear_monitor

   Elize Ryd wearing in-ear monitors during a concert in 2018. In-ear monitors, or simply IEMs or in-ears, are devices used by musicians, audio engineers and audiophiles to listen to music or to hear a personal mix of vocals and stage instrumentation for live performance or recording studio mixing. They are also used by television presenters to ...