• White noise: Sound with an even amount of noise at all frequencies.
• Pink noise: Sound with an even amount of noise at all frequencies on a logarithmic scale.

Generation

• Random numbers create white noise.
• Method: start with white noise and apply filters until it is pink.
• Method: generate pink noise by stacking white noise filters and lowering their volumes at each octave.

Noise distribution

• White noise has the same distribution at each frequency.
• Pink noise has the same distribution at each octave.