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Overlapping Sounds Part I - St. Mary's H.S. Physics

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Uploaded by on Apr 9, 2010

Sound is sent down a pvc pipe submerged in water. The wave sent down the tube overlaps the waves reflecting off the water surface. When the tube is lifted to certain heights a standing wave is produced. When the sound is loud, it is because the transmitted wave overlapped constructively with the reflected wave emerging from the tube. The 1st resonance point corresponds to 1/4 wavelength and the 2nd corresponds to 3/4 of a wavelength.
http://www.stmary.ws/highschool/physics/home/lab/lab4/standing_waves_lab.htm
http://www.stmary.ws/highschool/physics/home/notes/waves/StandingWave.htm

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