| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a thin and lightweight sound absorbing material exhibiting an excellent sound absorbing effect on sounds in a broad frequency band including a low frequency range. Ž<P>SOLUTION: The sound absorbing material 3 includes a first layer 1 formed of a porous body, and a second layer 2 formed of a solid knit material laminated on the first layer 1. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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