Radiation mechanisms from bowed violins
Abstract
The regions responsible for sound radiation from bowed violins have been localized across a frequency range from 294 Hz to 3 kHz, by applying an extension of Nearfield Acoustical Holography (NAH) using multiple hologram planes. Three violins were tested: a common student instrument by Scherl & Roth; the Hutchins violin SUS295, which has been the subject of many previous investigations, including modal analysis; and a Hutchins mezzo-violin, which is longer, broader and thinner than a standard instrument. The violins were bowed continuously and repeatably with an open-frame mechanical bowing machine, which held the violin free while NAH measurements were made on four planes surrounding the violin. In addition to NAH measurements, measurements of the farfield directivity patterns and the radiated power were conducted, supplementing the analysis of radiated sound field results.
- Publication:
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Ph.D. Thesis
- Pub Date:
- 1998
- Bibcode:
- 1998PhDT.......157W
- Keywords:
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- Physics: Acoustics, Engineering: General