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Lab 8 - Lab 8 Sound Waves Section 442 Arada Malekian...

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Lab 8 – Sound Waves Section 442 – Arada Malekian Thursday, April 7, 2011 Alec Rubenstein Partners: Andres Novoa Pledge: Data & Analysis: Part A: Tuning Fork – Rubber Mallet Model Amplitude Frequency (Hz) C256 0.0109 253.91 B480 0.120 478.52 Tuning Fork – Plastic Mallet (soft) Model Amplitude Frequency (Hz) C256 0.00447 253.91 B480 0.0117 478.52 Mono Chord Amplitude Frequency (Hz) Pluck 0.00234 673.83 Hammered 0.000808 332.03 Human Voice Amplitude Frequency (Hz) “oh” 0.0259 400.39 “ah” 0.134 683.59
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Part B: Resonance Data Vibration Type Frequency (Hz) Inner Tube Length (m) n λ (m) Velocity (m/s) RE (%) Low 480 0.166 1 0.664 319 7.29 Medium 480 0.530 3 0.707 339 1.48 Calculations: Equation for the velocity of sound waves in air Discussion: In part A of the lab, the tuning fork produced expected results for the amplitude and frequency of the two forks. The frequency of the fork was not dependent on how hard the fork was struck, while the amplitude was correlated with the striking force. The monochord produced interesting results as well. With the monochord, the method of use affected both amplitude and frequency.
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