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What happens when two wave pulses meet in the middle? Send waves down a spring to watch them travel and interact.

We listen to stereo music systems, tv's, and radios because it simulates being where the sound originates.

Listen to the beat of gravity. By taking two strings with weights tied to them at different, yet uniform intervals, you can hear the uniformity (and rhythm) of gravity's accelerating pull.

Sound can travel through a variety of media.

Sound changes pitch relative to how you or the source of the sound is moving. Use this simple activity developed by the Exploratorium to experience the Doppler Effect yourself!