Violins characterization through vibro-acoustic experiments
Résumé
An approach of integrated vibratory and acoustic experiments oriented to identify the specific characteristics and peculiarities of violins is presented in the paper. Today the up-level luthery handicraft needs a scientific and methodical supports specifically oriented to underline the acoustic peculiarities of each musical instrument, able to define the signature of a specific instrument. The proposed approach integrates vibration and acoustic non destructive analyses of the musical instrument considered as only copy extant: the approach has been actually developed with regard to the violins family but can be, more in general, proposed. A three-dimensional parametric model of a violin is integrated with a FE model. The theoretical model is validated through experimental analyses of single parts of the violin during the construction or on the complete instrument. Experimental modal analyses based on the use of micro-hammer and micro-accelerometers are applied not only to the finished violin but also during previous significant construction phases like varnishing. Mechanical and thermo-graphic detections in contact areas of relative motion (e.g. string on the bridge) allow acquiring peculiar information. Finally acoustic experiments finalized to the three-dimensional mapping of the sound produced by the played instrument allow defining the vibro-acoustic signature of the violin.
Domaines
Acoustique [physics.class-ph]
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