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The purpose of this study is to estimate the improvement effect to floor impact sound insulation performance by double ceiling system with cross laminated timber panels (=CLT panels). Floor impact sound insulation experiments concerning CLT panel double ceiling systems with eight arrangements were carried out in the laboratory. From the results, CLT panel double ceiling system tested in this research was revealed to have more effectiveness to heavy/soft floor impact sound insulation than common gypsum boards double ceiling system. Further, sound pressure in the back cavity and vibration of ceiling panels were also measured and discussed.

ＣＬＴパネル二重天井による床衝撃音低減効果に関する検討