Earphones
Earphones or earbuds are a small type of audio listening device, similar to headphones, that people wear in their outer ear. Earphones are lighter and more portable than headphones. They let people listen to music on a MP3 player, mobile phone, computer, or any other audio device.
Earphones that are worn inside the ear canal are called In-ear headphones or In-ear monitors. They typically have better sound quality.
Earphones Media
AKG headphones on a stand
Telephone operator with a single head-mounted telephone-receiver (headphone), 1898
Wireless telegrapher Reginald Fessenden with two head-mounted telephone-receivers (headphones), 1906
Holtzer-Cabot telephone operator head receiver, wireless operator receiver, and telephone receiver, 1909
Sennheiser HD 555 headphones, used in audio production environments (2007)
Headphone cord with integrated potentiometer for volume control