Equipment
Headphones
Headphones (also known as earphones, stereophones,
headsets, or the slang term cans) are a pair of transducers
that receive an electrical signal from a media player or receiver
and use 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
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.
More on headphones:
3345, the Vinyl Records Home.
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