Acoustic quality of vene wood (Pterocarpus erinaceus Poir.) for xylophone instrument manufacture in Mali

作者：Traore Bakary; Brancheriau Loic^*; Perre Patrick; Stevanovic Tatjana; Diouf Papa

来源：Annals of Forest Science, 2010, 67(8): 815.

DOI：10.1051/forest/2010054

• acoustic property
• basic density
• extractives
• ring width vene wood (Pterocarpus erinaceus Poir.)
• xylophone

Vene wood (Pterocarpus erinaceus Poir.) is currently the favorite wood for manufacture of xylophone in Mali. A dynamic analysis method with free boundary conditions, known as BING, was used to determine the main acoustic properties: specific dynamic modulus (E(L)/rho),damping coefficient or internal friction (tan delta), sound radiation coefficient (SRC) and peak response (PR).
The aim was to investigate the acoustic properties of vene wood (1) along three radial locations (internal: IHW, median: MHW, external: EHW); (2) related to two geographic origins (Guinean and Soudanian areas); and (3) to investigate the effect of ring width (RW), basic density (D(b)) and extractive content (EC) on these properties.
High correlations were shown between tan delta with E(L)/rho and EC. and decrease with increasing E(L)/rho or EC. No significant difference of SRC was found between the geographic areas and the radial locations. No correlation between RW and acoustic properties was observed. E(L), E(L)/rho and PR were significantly higher for wood from the Guinean area than from the Soudanian area and also higher for EHW and MHW than for IHW. tand follows inverse trends. These results could explain why the Malian xylophone makers empirically use only the wood from EHW and MHW.

• 出版日期2010-12