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Sound Waves and Beats - Sound Waves and Beats I n t...

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Sound Waves and Beats Introduction: Sound waves consist of a series of air pressure variations. A microphone diaphragm records these variations by moving in response to the pressure changes. The diaphragm motion is then converted to an electrical signal. Using a microphone and a computer interface, the properties of common sounds can be explored. Objectives: Measure the frequency and period of sound waves from tuning forks Measure the amplitude of sound waves from tuning forks. Observe beats between the sounds of two tuning forks. Materials: Computer Vernier computer interface Vernier microphone Logger Pro 2 tuning forks or electronic keyboard Rubber mallet Masking tape Data Collection and Observation:
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Part 1 Simple Waveforms Tuning Fork or Note Number of Cycles t (s) Period (s) Calculated Frequency (Hz) 1024 C 50 0.0490 s 0.000980 s 1020.41 1024 C (taped) 49 0.0489 s 0.000998 s 1002.00 Tuning Fork of Note Amplitude (V) 1024 C 0.0615 1024 C 0.0365 Tuning Fork of Note Parameter A (V) Parameter B (s -1 ) f=B/2 π (Hz) 1024 C 0.06257 ± 8.326E-
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