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Demonstrations include: 1: Nature of Sound and Waves - Sources and Propagation of Sound; 2: Propagation of Sound - Direct Measurement of the Speed of Sound in Air and Metal; 3: Transmission of Sound Through a Medium - Attenuation of Sound in a Vacuum; 4: Refraction of Sound - Carbon Dioxide Sound Lens; 5: Interference of Sound - Sound Divided into Paths of Differing Length; 6: Interference of Sound - Beat Phenomena; 7: Demonstration of Sound - Bending of Sound by an Obstacle; 8: Doppler Effect - Frequency Shift of Moving Sound Source. Most demonstrations between 2-4 minutes in length.