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Wednesday, July 10 • 15:30 - 18:00
PHYSICAL MODELING SOUND SIMULATIONS FOR THE STUDY OF THE QUALITY OF WIND INSTRUMENTS

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Physical modeling sound simulations can be potentially interesting for instrument design as far as they are representative of the functioning of the real instrument. This work studies to what ex-tent sound simulations of a brass instrument (the trumpet) are predictive of certain playing char-acteristics of the instrument (intonation, timbre). The physical model used is based on an acous-tical modeling of the resonator (characterized by its input impedance), a mechanical model of the excitator (one degree of freedom outward striking valve for the vibrating lips), and an aeroelastic coupling between the excitator and the resonator. Two simulation methods are implemented: (1) the harmonic balance technique (a frequency method for the calculation of sounds in permanent regimes) and (2) time-domain simulations based on the impulse response of the resonator. Dif-ferent trumpets, obtained by small variations of the geometry of the leadpipe (tube connecting the mouthpiece to the tuning slide) are on the one hand simulated on different regimes, and on the other hand played by a real musician on different notes. Different descriptors (intonation, spectral centroid) of the played notes are extracted to characterize differences between the trum-pets. A comparison of the results is conducted in order to assess to what extent sound simula-tions are able to predict certain dimensions of the quality of the instrument when it is played


Wednesday July 10, 2019 15:30 - 18:00 EDT
St-Laurent 3, Board 14-B
  T14 Musical acoustic, SS04 Physic model of music instrum & voice