Wolfram Demonstrations Project
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Frequency Spectrum of a Noisy Signal

This Demonstration generates a sine wave signal with random noise. You can visualize a plot of the signal's amplitude or its frequency spectrum. The frequency spectrum is calculated using the discrete Fourier transform of sampled amplitude values.

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"Frequency Spectrum of a Noisy Signal" from the Wolfram Demonstrations Project
 http://demonstrations.wolfram.com/FrequencySpectrumOfANoisySignal/
Contributed by: Jon McLoone
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