| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a soundproof sheet that does not consume artificial energy and allows circulation of external air.SOLUTION: The soundproof sheet 200 includes: a sheet 10 made of a deformable material having a plurality of through holes and having flexibility; and sound collecting portions each of which has, in the center, a through hole whose center substantially matches with each through hole of the sheet 10, has a shape whose diameter increases as the distance from the sheet 10 increases, and is disposed outside the sheet 10.</p> |
