This study was carried out about influential factors for measurement results of the reduction of floor impact sound pressure level (
ΔL) with wooden floating floor in laboratory and the application to actual buildings. First, experimental study was conducted to investigate about influence for insulation performance by peripheral treatments and the critical parts of wooden floating floor. Next, the difference of
ΔL results measured on two different thickness slabs were viewed. At the last, to predict insulation performance in actual floor from
ΔL in laboratory, application methods considering conditions in site (assuming installation area, restriction and ceiling) were investigated.
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