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An experimental method for measuring the directivity of violin sound radiation is described, along with detailed derivations of the key mathematical and physical concepts involved. The test violin is mounted on a turntable and excited by a mechanical oscillator at a variety of frequencies. A microphone detects the resulting sound, which is processed using the Fast Fourier Transform to isolate individual frequencies. Measurements are taken at many points around the instrument and graphed on a polar plot to visualize the directivity. Theories as to the possible sources of the directivity are discussed.
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Becker, Rachel, "An Experimental Investigation of the Directivity of Violin Sound Radiation" (2012). Senior Projects Spring 2012. 366.