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Related Experiment Videos

The violin bridge as filter.

George Bissinger1

  • 1Physics Department, East Carolina University, Greenville, North Carolina 27858, USA. bissingerg@gcu.edu

The Journal of the Acoustical Society of America
|August 1, 2006
PubMed
Summary

The violin bridge

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Area of Science:

  • Acoustics
  • Musical Instrument Physics
  • Vibrational Analysis

Background:

  • The violin bridge significantly influences a violin's sound.
  • Understanding the bridge's vibrational behavior is key to violin acoustics.

Purpose of the Study:

  • Investigate the role of the violin bridge in sound production.
  • Analyze the relationship between bridge properties and violin quality.

Main Methods:

  • Modal and acoustic measurements on 12 violins.
  • Systematic analysis of bridge rocking frequency (f(rock)) and wing mass decrements (deltam).
  • Measurement of bridge driving point mobility (BH) and radiativity.

Main Results:

  • No isolated bridge resonances were found; complex bridge motions were observed.
  • A broad peak (BH) near 2.3 kHz in bridge mobility was present in both good and bad violins.
  • Increased mass damping (deltam) generally enhanced radiativity, while lower rocking frequencies (f(rock)) reduced sound radiation, particularly at low and high frequencies.

Conclusions:

  • Violin quality did not correlate with BH driving point, corpus mobility, or radiativity.
  • Bridge modifications affecting rocking frequency and damping can alter sound radiation profiles.
  • Specific bridge properties can mimic the acoustic output of lower-quality violins.

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