Abstract
Holographic interferometry gives the greatest spatial resolution of any method of modal analysis. However, recording holograms on photographic film is time consuming and often inconvenient. Electronic systems that use CCD TV cameras to record images and form the interferograms in a small digital computer avoid these inconveniences. In a typical electronic TV holography system, a new interferogram is displayed 30 times a second, providing the opportunity to view the interferograms in real time as some parameter is varied. We illustrate this method by describing the vibrational modes of several musical instruments, including bells, gongs, cymbals, drums, violins, cellos, guitars, mandolins, and steelpans.
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