According to the FOURIER THEOREM, periodic sound may be shown to consist of SINE WAVEs in the HARMONIC SERIES ... obtained in this way by analyzing it during a representative section of its STATIONARY ...

If every period of sound has been subjected to Fourier analysis by a computer ... See: COMPLEX TONE, FOURIER THEOREM, HARMONIC SERIES, SINE WAVE. Compare: GRANULAR SYNTHESIS, SOUND SYNTHESIS.