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Trombone bore optimization based on input impedance targets.

Alistair C P Braden1, Michael J Newton, D Murray Campbell

  • 1School of Physics, University of Edinburgh, Edinburgh, United Kingdom. alistairbraden@gmail.com

The Journal of the Acoustical Society of America
|April 10, 2009
PubMed
Summary
This summary is machine-generated.

This study optimizes trombone design using input impedance targets, successfully predicting bore modifications. Further research is needed to align these targets with professional musician preferences.

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Area of Science:

  • Acoustics
  • Musical Instrument Design
  • Computational Physics

Background:

  • Input impedance target functions are utilized for designing brass musical instruments.
  • Understanding trombone bore characteristics is crucial for optimizing sound production.

Purpose of the Study:

  • To establish criteria for target functions in trombone bore optimization.
  • To develop an efficient optimization technique for modifying trombone input impedance.
  • To investigate the relationship between bore design, input impedance, and player preferences.

Main Methods:

  • Analysis of experimental input impedance data from various high-quality trombones.
  • Introduction and application of an "inharmonicity plot" for interpreting impedance curves.
  • Implementation of an efficient optimization technique to predict bore modifications.

Main Results:

  • The optimization technique successfully predicted bore changes to achieve specified input impedance modifications.
  • The method maintained a smoothly-flaring bell contour during optimization.
  • An "inharmonicity plot" aids in the interpretation of complex impedance curves.

Conclusions:

  • The developed optimization method is effective for modifying trombone input impedance while preserving bell geometry.
  • Further investigation is necessary to correlate optimized input impedance with professional player preferences.