- Earmuffs
Earmuffs are objects designed to cover a person's
ear s forprotection . They consist of a thermoplastic ormetal head-band, that fits over the top of thehead , and a pad at each end, to cover the external ears. They come in two basic kinds:
*Thermal earmuffs, worn in cold environments to keep a person's ears warm.
*Acoustic earmuffs, also known as ear defenders: cups lined with sound-deadening material, like thermal earmuffs andheadphones in appearance, which are worn as hearing protection. These may be carried on a head-band or clipped onto the sides of ahard hat , for use on construction sites. Some manufacturers combineheadphones with ear defenders, allowing the wearer to listen to a music, communication or other audio source and also enjoy protection or isolation from ambient noise. Acoustic earmuffs were created in Italy in 1982Fact|date=September 2008.ee also
*
Headphones
*Earplug s
*Muff s
*Noise-induced_hearing_loss External links
* [http://www.ideafinder.com/history/inventions/story091.htm Earmuff History - Invention of Earmuffs]
* [http://wineandwheels.com/2006/11/gear-grinds-180s-gimmicky-or-not.html Bicycle Ear Protection]
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