COMPATIBILITY OF FLOOR IMPACT SOUND LEVEL BY CHANGE OF HEAVY IMPACT SOURCE

Abstract

The car tire and the rubber ball are standard impact sources to measuring floor impact sound. Both impact sources have same impact time, but different frequency characteristics.
Purpose of this paper is to examine the correlation of two impact sources by comparing with frequencies in each floor impact sounds, and clarify the compatibility of two impact sources.
We found that both floor impact sounds are correlated with octave frequency of 63Hz and under, uncorrelated with 125Hz and over. Therefore, we can make equivalent evaluation of heavy weight floor impact sound at 63Hz band.