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In 1640 Marin Mersenne was the first person to measure the speed of sound on the air by measuring the returning echo.
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In 1660 Robert Boyle experiment on the sound radiation by a ticking watch in a partially evaculated glass vessel provided evidence that air is neccessary, either for the production or transmission of sound.
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In 1686 Isaac Newton published his principia book, where he included an interpretation of sound as being pressure pulses transmitted through neighboring fluids particles.
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In 1947 Several pilots tried to fly airplanes faster than the speed of sound. However, when Captain Chuck Yeager was able to accomplish this goal.
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Before 1963, the music of the sixties still reflected the sound, style and beliefs of the previous decade and many of the hit records were by artists who had found mainstream success in the 1950s, like Elvis Presley, Ray Charles, Dion, and The Everly Brothers.
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The "British Invasion" also began around 1963 with the arrival of The Beatles on the music scene and the type of rabid fandom that followed them would change the way people would view and interact with music and musicians forever.
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Often characterized as being shallow, 70s pop took many forms and could be seen as a reaction against the high-energy and activist pop of the previous decade. It began with singer-songwriters like Carole King and Carly Simon topping the charts, while New York City saw a period of great innovation; hip hop, punk rock and salsa were invented in 70s New York, which was also a center for electronic music, techno and disco.
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