Experimental Modal Analysis of Violin Bodies with Different Structural Patterns of Resonance Spruce
Mircea Mihălcică, Mariana Domnica Stanciu, V G Gliga, Mihaela Câmpean, Florin Dinulică, Silviu Marian Nastac · IOP Conference Series Materials Science and Engineering · 2021
Abstract The paper aims to highlight the modal response of violin bodies made of four quality classes of resonant wood, following the anatomical structure of the wood. The four categories of musical instruments, made at the S.C. Gliga Instrumente Muzicale S.A., were excited by an impact hammer type B&K 8204 and its response was captured by an accelerometer type B&K 4517-002 (Brüel & Kjær, Denmark, Nærum). The received signals were transmitted through a conditioning device to a Dynamic Signal Acquisition System (DAQ) - NI USB-9233 (National Instruments, USA, Austin), connected to a laptop. The obtained signals were in the form of the natural frequencies and the damping factor. The results highlighted the nonlinear and inhomogeneous behavior of violins with different structural patterns, proving that their vibrations depend on many factors.