Wiktionary
red noise
n. A signal or process with a frequency spectrum such that the spectral energy density is proportional to the reciprocal of the frequency squared (1/f2).
Usage examples of "red noise".
Months later, when I rarely saw the Angels, I still had the legacy of the big machine -- four hundred pounds of chrome and deep red noise to take out on the Coast Highway and cut loose at three in the morning, when all the cops were lurking over on 101.
But the idea of Baylor trapped forever in some raw, red place inside his brain, in the heart of that raw, red noise he’.