Abstract
In order to determine the properties that make the violins of Antonio Stradivari among the best in the world, a project is underway to reverse engineer one of the great master’s instruments. To develop the methodology, a factory violin that can be disassembled is used as the initial test case. The focus of this article is to determine the best modal test methods to use on the violin. Comparative modal tests were performed on the same violin using two of the most common types of exciters: a shaker and an impact hammer. The results show that both methods have their benefits and limitations. Overall the shaker method resulted in less noise than the impact hammer. However, the shaker method also contained error due to mass loading issues of the response sensors, as well as issues with the boundary conditions at the input location. On the basis of these results, for the purposes of this study the impact hammer is shown to be the preferred method of excitation for the modal analysis of a violin.
Similar content being viewed by others
References
Pyrkosz, M., Van Karsen, C., and Bissinger, G., “Converting CT Scans of a Stradivari Violin to a FEM,” 28th International Modal Analysis Conference, Jacksonville, FL (2010).
Bissinger, G., “A Unified Materials-Normal Mode Approach To Violin Acoustics,” A Unified Materials-Normal Mode Approach To Violin Acoustics 91(2):214–228 (2005).
Bissinger, G., “Structural Acoustics of Good and Bad Violins,” Structural Acoustics of Good and Bad Violins 124(3):1764–1773 (2008).
Marshall, K.D., “Modal Analysis of a Violin,” Journal of Acoustical Society of America 77(2):695–709 (1985).
Knott, G.A., A Modal Analysis of the Violin Using MSC/NASTRAN and PATRAN, M.S. Thesis, Naval Postgraduate School. Available through NTIS website (1987).
Bissinger, G., “3-D Laser Vibrometry Focuses On Legendary Old Italian Violins,” Sound and Vibration Magazine 41(7):10–15 (2007).
Bissinger, G., “The Violin Bridge as Filter,” The Violin Bridge as Filter 120(1):482–491 (2006).
Bailey, M., and Bissinger, G., “Modal Analysis Study of Mode Frequency and Damping Changes due to Chemical Treatments of the Violin Bridge,” 13th International Modal Analysis Conference, Bethel, CT, pp. 828–833 (1995).
Heron-Allen, E., “Violin-Making, As It Was and Is,” Ward, Lock & Co., London, UK, p. 161 (1885).
Avitable, P., O’Callahan, J., Chou, C-M., and Kalkunte, V., “Expansion of Rotational Degrees of Freedom for Structural Dynamic Modification,” 5th International Modal Analysis Conference, London, UK, pp. 950–955 (1987).
Ye, K., and Bissinger, G., “Attaining ‘Free-Free’ Normal Mode Frequency and Damping Conditions for the Violin,” 18th International Modal Analysis Conference, Bethel, CT, pp. 398–403 (2000).
Bissinger, G., “Modern Vibration Measurement Techniques for Bowed String Instruments,” Modern Vibration Measurement Techniques for Bowed String Instruments 25(4):43–46 (2001).
Allemang, R.J., “Investigation of Some Multiple Input/Output Frequency Response Function Experimental Modal Analysis Techniques,” Ph.D. Dissertation, University of Cincinnati. Available through University Microfilms International, pp. 150–214 (1980).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Pyrkosz, M., Van Karsen, C. Comparative modal tests of a violin. Exp Tech 37, 47–62 (2013). https://doi.org/10.1111/j.1747-1567.2012.00831.x
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1111/j.1747-1567.2012.00831.x