Beats are the regular variations in amplitude caused when two similar sounds that are close in frequency are played simultaneously. The resulting addition of the sound waves causes a periodic pulsing [..]

(n) a United States youth subculture of the 1950s; rejected possessions or regular work or traditional dress; for communal living and psychedelic drugs and anarchism; favored modern forms of jazz (e.g [..]

1. [0,1] a constant unit of time that forms a background clock in music. 2. [1] difference tones

   American writers and poets of the fifties and later whose works included social criticisms questioning the lack of individual freedom in American society, their followers were known as beatniks.

A group of Cardiac Arrhythmias in which the cardiac contractions are not initiated at the Sinoatrial Node. They include both atrial and ventricular premature beats, and are also known as extra or ecto [..]