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H3-71 STROKED ALUMINUM ROD 10 years 3 months ago #116

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ID Code: H3-71
Purpose: Illustrates longitudinal standing waves in an aluminum rod.
Description: Apply powdered violin rosin to your fingers or wear a rosined glove and stroke the aluminum rod firmly while holding it at a nodal point. Holding it in the center produces the fundamental, holding at 1/4 of the way from one end produces the second harmonic, holding at 1/6 of the way from one end produces the third harmonic, etc. The rod is about 6 ft long, and the speed of sound in aluminum is about 16,700 ft/sec, so the frequency of the fundamental is about 1400 Hz. The sound is very loud and lasts a long time; the Q for this system is around 100,000!
Availability: Available

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Last edit: by zzfixk21.
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