| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas permeable environment without leaking noise to the outside by being installed in a factory and a general home. SOLUTION: This sound insulating ventilation window is formed into a sound insulating ventilation window by forming a large number of through-holes 5 formed by boring a part between a plate 2 for constituting one surface and a plate 3 for constituting a surface opposed to this plate by filling a sound absorbing material 4 such as glass wool in a casing 1. COPYRIGHT: (C)2006,JPO&NCIPI
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