Abstract
Midshipmen will be getting involved in an ASA education outreach effort by presenting or video taping a number of acoustical demonstrations geared to promote a hands‐on learning experience for middle‐ and high‐school age girl Scouts. This is an extension of the demonstration effort and outreach presented at the ASA Meeting held in Baltimore in 2009. The demos are designed to visualize certain wave effects that will be explained by the Midshipmen “live” or by video. The participants will be free to explore and then control the apparatus and make their own scientific discoveries. The hands‐on demonstrations will include (1) a ripple tank with an electronic wave height transducer for wave visualizations or making simple oscilloscope measurements, (2) a torsion wave machine for demonstrating reflection and interference effects, and (3) a forced damped harmonic oscillator apparatus that consists of a subwoofer driver connected to the bottom of a vertical spring that is attached at the top to a hanging mass on a string that is suspended over a pulley. Resonance effects can be easily observed watching the pulley oscillate around 1 Hz. The driver frequency is controlled by adjusting a single knob and looking at the digital display.
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