| 摘要 |
PROBLEM TO BE SOLVED: To provide a sound insulation panel which is lightweight, thin, exerts high sound insulation performance in the range from low audio frequencies to high audio frequencies, and can be produced at a low cost. SOLUTION: The sound insulation panel is formed of one panel member 1 and the other panel member 2 arranged with an interval from the one panel member 1. Each of the one panel member 1 and the other panel member 2 is formed of a surface plate 3, and a sound absorbing material 4 arranged inside the surface plate 3. The sound absorbing material 4 is made of a shapeless sound absorbing material such as glass wool covered with a protective sheet 6. Further the one panel member 1 has a metallic plate 5 such as an iron plate arranged inside the sound absorbing material 4 thereof. COPYRIGHT: (C)2009,JPO&INPIT
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