Label for 2.0 sound, Stereo
Stereophonic sound, also simply called stereo, is the reproduction of sound using two or more audio loudspeakers. This creates a pleasant and natural sound heard from various directions, as in natural hearing.
The word "stereophonic" comes from Greek stereos = "solid" and phōnē = "sound". It was coined by Western Electric.
In popular usage, stereo usually means two-channel sound recording and sound reproduction using data from two speakers. The electronic device for playing back stereo sound is often called "a stereo".
Images for kids
Diagram of Clément Ader's théatrophone prototype at the Opera during the World Exhibition in Paris (1881).
Bell Labs demonstration of stereo at World's Fair
Label and sleeve from Audio Fidelity Records' second stereo demonstration record, ca. 1958.
HH Scott Model 350, ca. 1961: the first FM multiplex stereo tuner sold in the US