Statistical sound textures can be built from 30-ms overlapping pure tones across 2.2 octaves.

Evidence

The texture was a tone cloud consisting of a sequence of 30-ms, temporally overlapping pure tones whose frequency covered a range of 2.2 octaves (400–1840 Hz) divided in 8 frequency bins. The frequency resolution of the tone distribution was 12 semitones per octave, starting at 400 Hz. This allowed 26 tone frequencies in total with 3–4 frequency values in each frequency bin. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3296