Impact noise insulation has traditionally been thought of in terms of vertical adjacencies, but lateral impact transmission can be significant whenever there are continuous structural elements across a junction (e.g., concrete or CLT slabs, or plywood floor sheathing). ASTM E1007 allows for non-vertical measurements but does not define the tapping machine locations for such measurements; ISO 16283-2 requires the tapping machine to be located randomly in the source room. The authors have demonstrated an advantage to maintaining a constant distance from the tapping machine to the wall–floor junction and have developed methods and practices for performing this measurement. These findings are reviewed. Structural flanking path calculations per ISO 12354 provide a framework for understanding and predicting major features of lateral and diagonal impact noise transmission such as frequency dependence. It is argued that high-frequency impact ratings such as NHIR are usually the appropriate single number ratings to evaluate these measurements. Classifications are discussed, and changes to E1007 to clarify the measurement method are advocated.
Dong et al. (Wed,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: