| 摘要 |
PURPOSE: A ceiling material structure for cutting off a floor impact noise is provided to easily cut off a low-frequency noise transmitted to a lower story from an upper story of an apartment building and to facilitate work performance and handling by thin thickness. CONSTITUTION: In a ceiling material structure for cutting off a floor impact noise, ceiling finishing materials like a gypsum board are combined to the lower part of a slab layer constituting the ceiling of a building by pieces, anchors, and frames. PET(Polyethylene Terephthalate) noise absorption and cutoff materials are layered to a space part between the slab layer and the ceiling finishing material. In the PET noise absorption and cutoff materials, a Polyethylene Terephthalate noise absorption material(with the areal density of 400g/m2 and the thickness of 10mm), a noise cutoff sheet causing board vibration, and a Polyethylene Terephthalate noise absorption material(with the areal density of 100g/m2 and the thickness of 5mm) are layered.
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