The measurement of structure-borne noise for constructions of cross-laminated timber floors with lightweight timber framed interior walls

The new four-room flanking facility at the National Research Council Canada has been used to measure the velocity level difference for junctions of cross-laminated timber floors and non-loadbearing lightweight timber walls. This combination of elements is typical of mass timber constructions in Canada, but neither velocity level difference data nor normalized level difference data for these types of constructions has been available for designers to estimate the apparent sound transmission loss of these constructions. The measurements in the flanking facility include different combinations of cross-laminated timber floors and lightweight timber walls as well as different floor and ceiling linings. The goal in part is to develop new empirical models for the velocity level difference as well as to develop guidance for refining the prediction method described in the standards, ISO 12354-1 and ISO 10848-1