Abstract
The method of floor impact sound level measurement is investigated because it takes much time to measure the floor impact sound level by the present method. The result of investigation using measured data on multiple dwelling houses, it was clear that the L-value of light floor impact sound level were equivalent to A-weighting floor impact sound level. And it was clear that the heavy floor impact sound level are different in each measuring points. In case that hitting point and receiving points are more than 3, the L-value is equivalent to the L-value measured using 5 hitting points and 5 receiving points.
