Evaluation of Reduction Performance of Floor Impact Sound on Floor Covering in the Reverberation Chamber

摘要

In order to reduce floor impact sound in apartment houses, 30 types of floor coverings were chosen to evaluate a performance of reduction in impact sound in the reverberation chamber. During tests examining the performance of reduction in impact sound using a bang machine, an effective performance of impact sound reduction can be ensured at a low frequency band of 63 Hz and 100 Hz. However, impact sound was amplified at a band of 80 Hz and 125 Hz except for some floor coverings. During tests examining the performance of reduction in impact sound using a rubber ball drop from a height of 100 cm, a performance of reduction in impact sound was improved from a band of 50 Hz up to 400 Hz. During the test of a rubber ball drop from a height of 40 cm, which was similar to the impact of children running, a performance of reduction in impact sound was improved from a band of 80 Hz and 160 Hz up to 400 Hz.