This is an approximation of acoustic spectra extended in time.

Tornadoes emit widely on the acoustics spectrum and the sounds are caused by multiple mechanisms.

Daniel Charles has described him as the person who decimated monody by the demultiplication of the acoustic spectrum.

Compared with octave-repeating scales, its intervals are more consonant with certain types of acoustic spectra.

And noise on land disrupts intricate ecosystems of sound, where different species divide the acoustic spectrum between them so that they do not interfere with each other's communication.

According to Ridgway, "They were definitely unlike usual sounds for a [beluga], and similar to human voices in rhythm and acoustic spectrum."

The sounds were a squeaking shrillness that changed from day to day as Trixia and the other Focused linguists determined where in the acoustic spectrum the sense of Spider talk was hidden, and devised convenient representations, both auditory and visual, for its study.