Vibration

(It. vibrasio’ne; Fr. vibration; Ger. Schwing’ung.) The rapid oscillation of any tone-producing body, as a string, an air-column, the vocal cords, etc...Amplitude of vibration, the widest departure of a tone-producing body, towards either side, from a point of rest... Amplitude of a single vibra tion, properly, the departure of the tone producing body from the middle point towards one side only; but frequently made to comprehend the entire widt of the excursion from side to side... Double vibration, the excursion of a tone-producing body (as a string) from one side to the other and back again... Vibration-number, a figure representing the number of vibrations (usually estimated by doud/e vibrations) made by a tone.