Headphones are a pair of smallloudspeakers, or less commonly a single speaker, held close to a user's ears and connected to a signal source such as an audio amplifier, radio, CD player, or portable media player. They are also known asstereophones, headsets or, colloquially,cans. The in-ear versions are known asearphones or earbuds. In the context oftelecommunication, the term headset is used to describe a combination of headphone and microphone used for two-way communication, for example with a mobile.
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