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Encyclopedia > Earpiece
In-ear headphones

Headphones (also known as earphones, stereophones, headsets, or the slang term cans) is a transducer that receives an electrical signal from a media player or receiver and uses speakers placed in close proximity to the ears (hence the name earphone) to convert the signal into audible sound waves.

They are normally detachable, using a jack plug. Typical products to which they are attached include the walkman, mobile phone, CD player, digital audio player (MP3 player), and personal computer. Some headphone units are self-contained, incorporating a radio receiver. Other headphones are cordless, using radio (e.g. analogue FM, digital bluetooth, WiFi) or infrared signals to communicate with a "base" unit.

Headphones may be used to prevent other people from hearing the sound either for privacy or to protect others. They are also used to exclude external sounds, particularly in sound recording studios and in noisy environments.

Generally headphones can be divided into two categories, closed and open. Closed headphones isolate background noise better, while open headphones offer a more "open" sound. Typically open headphones will sound better than similarly priced closed headphones.

Using headphones at a sufficiently high volume level causes temporary or permanent hearing impairment or deafness. Other risks arise from the reduced awareness of external sounds — some jurisdictions regulate the use of headphones while driving vehicles. Also, most European countries have imposed high penalties since 2002 on drivers not using a headset while operating a mobile phone in a car, to ensure that drivers keep their hands on the vehicle's controls.

Headphones generally use a 3.5mm "mini pin" jack.

Prominent manufacturers of headphones

See also

External links

  Results from FactBites:
Earpiece - Memory Alpha - A Wikia wiki (1341 words)
An earpiece was a wireless receiver device used by communications officers, science officers and navigators during the 22nd and 23rd centuries.
Although expectation of the impact caused her to jerk the earpiece away from her ear, Hoshi soon after replaced the earpiece in an attempt to locate Captain Archer and Commander Tucker, who were aboard a Suliban helix in a lower layer of the atmosphere.
While later wearing her earpiece, Uhura hailed an object approaching the Enterprise that was actually a ship under the command of Balok, who had meant the cube to be a warning buoy.
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Earpiece spy for covert communication from Headset encourages covert communications in the field.
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