The Experimental Research on the Sound Absorption Coefficient of Several Different Mytilaria Laosensis Veneering Boards
The composite acoustics board with pore-tank structure and variable cross section structure are made of Medium Density Fiberboard(MDF) as base material, Mytilaria laosensis sheet as veneer board, and sound absorption mat as the substructure material with the micro-perforation interlayer structure. The test was carried out to compare the absorption coefficient of Mytilaria laosensis sheet and nine samples by standing wave tube The test result shows that Mytilaria laosensis sheet has a low sound-absorbing performance itself, and its sound-absorption coefficient in all frequency ranges less than 0.3 and cannot be used as the sound-absorption board alone; The variable cross section structure sound-absorption board has a better performance than the pore-tank structure; When using the micro-perforation layer structure, the sound absorption board performs better and the sound absorption coefficient improves markedly in middle and low frequency scope.
Daizhong Su, Kai Xue and Shifan Zhu
C. W. Su et al., "The Experimental Research on the Sound Absorption Coefficient of Several Different Mytilaria Laosensis Veneering Boards", Key Engineering Materials, Vol. 486, pp. 95-98, 2011