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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 7 — Mar. 1, 2009
  • pp: C165–C170

Mechanical and optical investigation of dynamic behavior of violins at modal frequencies

Ewa Skrodzka, Antoni Krupa, Eike Rosenfeld, and Bogumił J. Linde  »View Author Affiliations


Applied Optics, Vol. 48, Issue 7, pp. C165-C170 (2009)
http://dx.doi.org/10.1364/AO.48.00C165


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Abstract

Two main aims of our investigation are to show differences in natural vibrations between two violins that differ in the thickness of the back plate and to determine whether they are linear systems. Two experiments were performed on the top and back plates. The first experiment was a mechanical modal analysis in a version with a fixed response point. In the second experiment optical measurements of the plate’s velocities in modal frequencies obtained from the first experiment were performed by use of laser Doppler vibrometry. The second experiment was a simplified modal analysis experiment with a fixed excitation point. Changes in the thickness of the back plate caused changes in certain modal frequencies of both plates. However, no important differences in mode shapes were found in both experiments. Thus, violins can be treated as linear systems but with great care.

© 2009 Optical Society of America

OCIS Codes
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(280.3340) Remote sensing and sensors : Laser Doppler velocimetry

History
Original Manuscript: October 20, 2008
Revised Manuscript: December 23, 2008
Manuscript Accepted: January 12, 2009
Published: February 23, 2009

Citation
Ewa Skrodzka, Antoni Krupa, Eike Rosenfeld, and Bogumił J. Linde, "Mechanical and optical investigation of dynamic behavior of violins at modal frequencies," Appl. Opt. 48, C165-C170 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-7-C165

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