Comparison and prediction of modal parameters of a strung and unstrung piano soundboard
Duane Leggett, Michael W. Miller, Robert D. Celmer · The Journal of the Acoustical Society of America · 1992
The first eight modes of an unstrung Steinway model-K upright piano soundboard were measured by testing both the front and back sides. Strong similarities in the first eight modal frequencies and mode shapes were found even though 40% fewer test points were used on the back side. Using the dynamic modification feature of the STARStruck modal analysis software system, a prediction of modal parameters was performed for the structural features of a strung piano. Comparison of these results to the actual modal frequencies and mode shapes found by testing the back side of a strung piano soundboard will be discussed. [Work supported by Steinway and Sons.]