| 摘要 |
PROBLEM TO BE SOLVED: To provide a sound absorbing structure that has high recyclability and can exhibit excellent sound absorptivity enough to substitute for a hard-to-recycle material such as glass wool. SOLUTION: The sound absorbing structure includes at least a 1st thin film 11 and a 2nd thin film 12 which are laminated adjacently to each other, and the 1st thin film 11 or/and the 2nd thin film 12 have at least one of a projection part and a recessed part (projection part (a) in Fig.). Films made of metal, resin, etc., are usable as the thin films 11 and 12. The thin films 11 and 12 preferably have many fine through-holes formed. COPYRIGHT: (C)2004,JPO&NCIPI
|
