In this paper, we study a practical method for predicting the light-weight floor impact sound level reduction of a dry floating floor. In the laboratory, we conducted an experiment to check the correspondence between the measured and the calculated value. The calculated value of the light-weight floor impact sound level reduction amount of the dry floating floor consists of the following three items.
(1) Change in impact exposure level due to different floor structures
(2) Vibration damping in dry floating floor boards
(3) Vibration reduction effect when vibration is transmitted from the dry floating floor to the slab
We proposed the total amount of vibration reduction. The total vibration reduction is obtained by synthesizing the vibration reduction of the general part and the floor end according to the ratio of the number of supporting legs. The correspondence between the calculated and the measured values was verified for 9 cases. The 9 cases differ in the floor boards, rubber of the general part and the floor end part, etc. The correlation coefficient between the calculated and the measured value of the light-weight floor impact sound level reduction (63 to 1k Hz (1/1 Oct.)) was 0.97. The validity was confirmed by testing the correlation coefficient.
