Many students are troubled by the idea of sound being a wave when there are no crests and troughs. Mr. H clears up the confusion with a short presentation on why sound can be thought of as a pressure wave.
Categories of Waves video referenced on Slide 3 can be found here:
• Categories of Waves
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Physics Interactives, Waves and Sound Chapter, Simple Wave Simulator
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Minds on Physics, Sound and Music Module, Mission SM1 - Nature of a Sound Wave
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Science Reasoning Center, Sound Chapter, Sound as a Pressure Wave
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Tutorial on Sound and Music, Lesson 1, Sound as a Pressure Wave
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