Abstract
A variety of tests were done on an acoustic guitar to help characterize and quantify the radiated sound. Modal analysis was performed to determine resonant low frequency modes of the guitar and the motion of the air in the sound hole. Mechanical impedance and mobility measurements were taken at the bridge. String decay and radiated decay times were measured at several fret positions to study the interaction between modal resonances and decay times. Many of these individual tests have been performed on acoustic instruments before. This paper will combine the analysis of all tests and measurements to show that the modal frequencies play a large role in affecting the sound quality of an acoustic guitar.
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