An Interesting Fourier Transform – 1/F Noise

Math says a weird hiss may hide a huge secret — commenters say, not so fast

TLDR: The article argues a strange kind of background noise may share a deep mathematical symmetry that could help explain a long-running physics puzzle. Commenters were split between amazement that this noise is still mysterious and eye-rolling that the “big clue” may be less unique than advertised.

A dusty-but-juicy math idea about 1/f noise — the faint, stubborn background hiss found in electronics and nature — has commenters acting like they’ve stumbled into a 20-year-long basement argument that never ended. The article’s big tease is deliciously dramatic: a certain kind of curve seems to look strangely similar even after a mathematical “flip” between time and frequency, and that symmetry might help explain one of physics’ oldest mysteries. In plain English: the same shape keeps showing up in two different views of the same problem, and that has people wondering if it’s a clue or just a neat trick.

But the real fireworks are in the reactions. One camp was genuinely stunned that the low-frequency part of the noise graph is still not fully explained. How is this still a mystery, asked one commenter, when modern life basically runs on signal processing? Another immediately cooled the hype, saying this self-mirroring behavior is “not unusual” and pointing to older papers that already build lots of similar pairs. Ouch. That’s classic comment-thread energy: one person sees a cosmic clue, another replies, “Actually, this is in the literature.”

Then came the peanut gallery. One user noted the real entertainment might be the article’s own ancient comment section — “20 years of people thinking about this” — which is internet archaeology gold. Others dragged the topic into music, noting pink noise shows up in sound generation because it feels more natural than pure randomness. And the bleakest take of all? “1/f noise basically kills averaging.” In other words: even when engineers try to smooth chaos away, this stuff keeps crashing the party.

Key Points

  • The article presents a one-sided power-law Fourier transform relationship of the form t^α ↔ ω^-(α+1), with additional phase and scaling terms.
  • The exact transform includes the unit step function u(t) in time and a Gamma-function scaling factor Γ(α+1) in frequency.
  • For α = 0, the transform matches the ideal integrator response; higher α values correspond to cascades of additional integrators.
  • As α approaches -1, the transform tends toward a flat magnitude and zero phase in frequency, corresponding to a delta function in time, but the formula is undefined exactly at α = -1.
  • The article highlights α = -0.5 as a self-similar case where both time and frequency domains follow the same power law and connects this to 1/f noise observed in amplifier measurements.

Hottest takes

“this property is not unusual” — mturmon
“this 0-100Hz line is unexplained” — TeMPOraL
“1/f noise basically kills averaging” — threatripper
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