Created by StemPy LabAn engineer wants to record a 70 Hz vibration without aliasing. How many readings each second must she take?
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← A string of length 0.45 m, fixed at both ends, carries waves of speed 63 m/s. What does this code print for its first three harmonics in Hz? `L, v = 0.45, 63.0; print([n * v / (2 * L) for n in (1, 2, 3)])`A sensor takes 40 readings, one every 0.025 s. What does this code print for the gap between FFT frequencies, in Hz? `import numpy as np; print(np.fft.rfftfreq(40, d=0.025)[1])` →
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