| Abstract | For each of a series of full-scale floor-ceiling assemblies, standard impact measurements were made with the sources defined in ISO 10140 including the tapping machine, the modified tapping machine, and the heavy/soft impact source (rubber ball), dropped from various heights. Additionally, sound recordings were made of the sounds generated by the ball drops and by adult walkers without shoes. The standard impact measurements were used to calculate standardized metrics and non-standardized variants. The recordings of the walkers' footfalls and of the "thumps" resulting from the ball drops were played back in a controlled laboratory room to listening test participants, who subjectively rated the reproduced sounds in terms of relative "annoyance". Preliminary results from 19 bare floors (i.e., no coverings) indicated: that listeners ranked the floor assemblies slightly differently for the walkers than for the ball drops; and that some objective metrics determined from measurements with the standard tapping machine and with the rubber impact ball correlated most highly with the subjective response to both types of impact sounds. |
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