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Acoustic dissipation in wooden pipes of different species used in wind instrument making: An experimental study

Henri Boutin 1, 2, * Sandie Le Conte 1 Stéphane Vaiedelich 1 Benoît Fabre 2 Jean-Loic Le Carrou 2
* Corresponding author
2 IJLRDA-LAM - Lutheries - Acoustique - Musique
DALEMBERT - Institut Jean Le Rond d'Alembert
Abstract : In this study, the acoustic dissipation is investigated experimentally in wooden pipes of different species commonly used in woodwind instrument making: maple (Acer pseudoplatanus), pear wood (Pyrus communis L.), boxwood (Buxus sempervirens), and African Blackwood (Dalbergia melanoxylon). The pipes are parallel to the grain, except one which forms an angle of 60° with the fiber direction. An experimental method, involving input impedance measurements with several lengths of air column, is introduced to estimate the characteristic impedance and the attenuation factor in the pipes. Their comparison reveals significant differences of acoustic dissipation among the species considered. The attenuation factors are ranked in the following order from largest to smallest: maple, boxwood, pear wood, and African Blackwood. This order is the same before and after polishing the bore, which is an essential step in the making process of wind instrument. For maple, changing the pipe direction of 60° considerably increases the attenuation factor, compared to those of the other pipes, parallel to the grain. Further, polishing tends to reduce the acoustic dissipation in the wooden pipes, especially for the most porous species. As a result, the influence of polishing in the making procedure depends on the selected wood species.
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Submitted on : Monday, May 15, 2017 - 3:50:37 PM
Last modification on : Wednesday, August 26, 2020 - 10:56:05 AM
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Henri Boutin, Sandie Le Conte, Stéphane Vaiedelich, Benoît Fabre, Jean-Loic Le Carrou. Acoustic dissipation in wooden pipes of different species used in wind instrument making: An experimental study. Journal of the Acoustical Society of America, Acoustical Society of America, 2017, 141, pp.2840. ⟨10.1121/1.4981119⟩. ⟨hal-01522816⟩



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