J. Phys. IV France 02 (1992) C1-89-C1-92
EXTRACTING THE TRANSIENT FROM PERCUSSIVE SOUNDSJ.L. MEILLIER1 and J. LAROCHE2
1 Laboratoire d'Acoustique de l'Université du Maine, Route de Laval, BP. 535, F-72017 Le Mans cedex, France
2 Télécom Paris, 46 rue Barrault, F-75634 Paris cedex 13, France
This work is concerned with the modeling of percussive acoustical signals, and focuses mostly on the sound's non-stationary onset. The original signal is modeled by a resonating filter fed with a short excitation-signal. The resonating filter reflects the acoustical properties of the instrument's body (frequencies and damping factors of the vibration modes), and the excitation signal models the way the instrument was set into vibration. The resonating filter is calculated by use of a cumulated time-frequency representation of the original signal. The excitation signal is obtained by use of inverse filtering with an optional regularization procedure. Analysis examples are given and some applications are proposed and discussed.
© EDP Sciences 1992