Mechanical response characterization of saxophone reeds
Résumé
Summary The subjective quality of single cane reeds used for saxophone or clarinet may be very different from a reed to another although reeds present the same shape and the same strength. In this work, we propose an experimental system in order to try to classify reeds in different families which could represent the musician feeling. In the long term, this measuring would enable to enhance the quality of the reed classification during the manufacturing process. The aim of the measurement is to estimate the equivalent mechanical parameters of the reed. The reed is mounted on a tenor saxophone mouthpiece which cavity is excited with a loudspeaker is the frequency range 500 Hz - 6 kHz. The acoustic pressure is measured in the mouthpiece and the reed displacement is measured using a optical sensor near the reed tip. The frequency Response Function is analyzed using a modal analysis technique (MDOF) and the equivalent reed parameters are estimated (mass, sti ness and damping) for each mode. Different reeds chosen for their subjective differences (rather di cult and dark, medium, rather easy and bright) are characterized with the measuring system and by measuring the mouth pressure and the spectral centroid of the acoustic pressure radiated at the saxophone horn. First results show that differences between spectral centroid of the radiated pressure could be explained by differences in the equivalent mass of the vibration mode estimated by means of the measuring system.
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