Biblioteca de la Guitarra y Cuerda Pulsada

Biblioteca de la Guitarra y Cuerda Pulsada

Autor: Ian Perry

Sound radiation measurements on guitars and other stringed musical instruments

This thesis focuses on physical measurements of the sound radiated by stringed musical instruments. The radiation efficiency, defined as the ratio of acoustical power output to mechanical power input, was measured to study the acoustical behaviour of the instruments between 80 Hz and 2000 Hz. The research used spherical-harmonic decomposition to determine the power output from monopole and dipole sources. On classical guitars, monopole power produced by the low-frequency resonance triplet provided the greatest contribution to the power output below 300 Hz. At higher frequencies, where the body modes have more complex shapes, dipole sources dominated the total power output. As the dipole contribution to the power output increases, the radiation efficiency of the instrument...


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