Tool
Power spectrum
Compare the Fourier power spectrum of periodic, quasi-periodic, chaotic, and stochastic signals. Broadband structure is the spectral signature of deterministic chaos.
Power spectrum signature
periodic → spikes at harmonic frequencies, dynamic range > 60 dB
quasi-periodic → spikes at incommensurate frequencies and their integer combinations
chaotic → broadband (continuous) spectrum, may include broad peaks
noise → flat spectrum (white) or 1/f^α (coloured)Spectral broadness is a quick (but not foolproof) chaos indicator.
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