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A simulation tool for brassiness studies.

Joël Gilbert1, Ludovic Menguy, Murray Campbell

  • 1Laboratoire d'Acoustique de l'Université du Maine, UMR CNRS 6613, Le Mans, France. joel.gilbert@univ-lemans.fr

The Journal of the Acoustical Society of America
|April 10, 2008
PubMed
Summary
This summary is machine-generated.

This study introduces a numerical model to predict brassiness in brass instruments, analyzing how sound spectra change with loudness. The model uses generalized Burger

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Area of Science:

  • Acoustics
  • Musical Instrument Science
  • Computational Physics

Background:

  • Brass instrument sound production involves complex nonlinear acoustics.
  • Previous models were limited to simple geometries and shorter propagation distances.
  • Quantifying 'brassiness' requires understanding spectral changes with dynamics.

Purpose of the Study:

  • To develop a frequency-domain numerical model for brass instrument sound.
  • To predict 'brassiness' (spectral enrichment) as a function of dynamic level.
  • To extend previous models to handle longer, non-uniform ducts.

Main Methods:

  • Utilizing generalized Burger's equations for weakly nonlinear wave propagation.
  • Implementing a frequency-domain numerical approach.
  • Simulating wave propagation in non-uniform duct geometries.

Main Results:

  • The model successfully simulates sound production in extended geometries.
  • Preliminary simulations explore periodic regimes in a trombone bore.
  • The model provides a tool to predict spectral enrichment with increasing dynamics.

Conclusions:

  • The developed numerical model is a relevant tool for predicting brassiness in brass instruments.
  • The model's extension to longer distances and complex geometries enhances its applicability.
  • Further simulations can refine understanding of nonlinear acoustic phenomena in brass instruments.