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When sound levels reach a high enough intensity, the sound, whether it is wanted or unwanted, may be damaging to hearing. [3] Environmental noise monitoring is the measurement of noise in an outdoor environment caused by transport (e.g. motor vehicles, aircraft, and trains), industry (e.g. machines) and recreational activities (e.g. music).
Ko-Ko Song Car-Tunes, Song Car-Tunes, or (as some sources erroneously say) Sound Car-Tunes, is a series of short three-minute animated films produced by Max Fleischer and Dave Fleischer between May 1924 and September 1927, pioneering the use of the "Follow the Bouncing Ball" device used to lead audiences in theater sing-alongs.
Beginning in February 1929, the song cartoons returned under a new name, Screen Songs, using the Western Electric sound-on-film process. The first was The Sidewalks of New York ( East Side, West Side ) released on 5 February 1929.
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The toy is formed out of two solid balls of polymer, each about 2 inches (5 cm) in diameter, attached to a finger tab with a sturdy string. The player holds the tab with the balls hanging below and through up-and-down hand motion makes the two balls swing apart and back together, making the clacking noise that gives the toy its name.
The bouncing ball is a virtual device used in motion picture films and video recordings to visually indicate the rhythm of a song, helping audiences to sing along with live or prerecorded music. As the song's lyrics are displayed on the screen in a lower third of projected or character-generated text, an animated ball bounces across the top of ...
When a ball impacts a surface, the surface recoils and vibrates, as does the ball, creating both sound and heat, and the ball loses kinetic energy. Additionally, the impact can impart some rotation to the ball, transferring some of its translational kinetic energy into rotational kinetic energy.
A bouncing ball captured with a stroboscopic flash at 25 images per second. Each impact of the ball is inelastic, meaning that energy dissipates at each bounce. Ignoring air resistance, the square root of the ratio of the height of one bounce to that of the preceding bounce gives the coefficient of restitution for the ball/surface impact.