Coupled simulation of vibration and sound field of Stradivari’s violin

A coupled simulation of the vibration and sound radiation of Stradivari violins, scanned using a micro-computed tomography scanner, was conducted using the finite element method. The aim of this study was to clarify the relationship between the vibration of the violin body and acoustic radiation around the violin. The highly precise geometry of a violin made by Stradivari was scanned using a micro-computed tomography scanner, and the material properties of the violin body (spruce and maple) were set as orthotropic properties in the numerical simulation. Additionally, the results of numerical simulations coupling the vibrations caused by forced oscillations on a bridge with the acoustic field pressure around the violin are shown. Furthermore, the sound pressure spread in a wide rectangular box was calculated by large-scale computing using an open-source parallel acoustic analysis software.