Title Work Title No: 24541 Medium: Moving Image Date: 1971 (Release) Original Summary: "High-speed photography and demonstrations of air molecules with powdered plastic and magnets establish the nature of sound as a form of wave energy. Illustrates sound waves in terms of amplitude, loudness, frequency, pitch, quality and Doppler effect, and shows the uses of sound in oceanography and geology" - Summary from Worldcat. Countries of Origin: U.S.A. Genres: Educational
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