Open AccessDynamic modal characterization of musical instruments using digital holography
Author(s) -
Nazif Demoli,
Ivan Demoli
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.004812
Subject(s) - optics , modal , holography , computer science , digital holography , characterization (materials science) , realization (probability) , modal analysis , fourier transform , holographic interferometry , vibration , acoustics , physics , materials science , mathematics , statistics , quantum mechanics , polymer chemistry
This study shows that a dynamic modal characterization of musical instruments with membrane can be carried out using a low-cost device and that the obtained very informative results can be presented as a movie. The proposed device is based on a digital holography technique using the quasi-Fourier configuration and time-average principle. Its practical realization with a commercial digital camera and large plane mirrors allows relatively simple analyzing of big vibration surfaces. The experimental measurements given for a percussion instrument are supported by the mathematical formulation of the problem.