| 摘要 |
PROBLEM TO BE SOLVED: To suppress deformation generated due to the influence of humidity entering from an opening into a hollow structure.SOLUTION: An acoustic structure 1 includes a first plate member 10 having an opening 101, a second plate member 20, and connection members 30 for connecting the first and second members to each other. These members form a hollow space A1 leading to an outside space via the opening 101. The first plate member 10 includes a first wooden plate 11 and a first moisture-proof member 12, and the second plate member 20 includes a second wooden plate 21 and a second moisture-proof member 22. The first wooden plate 11 has a first inner surface 112, and the second wooden plate 21 has a second inner surface 212. The first moisture-proof member 12 has a thickness in Z-axis direction which is larger than that of the second moisture-proof member 22. Thereby, the first moisture-proof member 12 suppresses dilatation of wood greatly more than the second moisture-proof member 22. |
