[How To] Record the Elusive Colors of Noise

While noise is by definition derived from a random signal, it can have different characteristic statistical properties corresponding to different mappings from a source of randomness to the concrete noise.

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Things you need:

taperecorder_Full[1]– Tape recorder with microphone
– Fingers to press record on tape recorder (In the case of severe finger loss, a toe can be used in its place)
– Blank tape (90min preferably)

What to Do and How to listen for Colors of Noise:

White Noise
White noise is a signal, named by analogy to white light, with equal energy per cycle (hertz).This produces a flat frequency spectrum in linear space.

Pink Noise
The frequency spectrum of pink noise is flat in logarithmic space; it has equal power in bands that are proportionally wide

Red noise
In fields that adopt precise definitions, the terminology “red noise”, also called Brown noise or Brownian noise, will usually refer to a power density which decreases 6 dB per octave with increasing frequency (density proportional to 1/f 2) over a frequency range which does not include DC (in a general sense, does not include a constant component, or value at zero frequency).

Blue noise
Blue noise is also called azure noise. Blue noise’s power density increases 3 dB per octave with increasing frequency (density proportional to f ) over a finite frequency range

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