Examines the prediction of impact sound transmission in dwellings, suggesting future building code changes.
The National Building Code of Canada (NBC) does not currently include protection from impact noise in dwellings. However, it is possible that such a requirement might be introduced in one of the future code cycles. To this end, the National Research Council of Canada (NRC) has formed an industry-sponsored consortium, the Special Interest Group on Impact Sound (SIG Impact), with industry associations and product manufacturers as members. The goal of SIG Impact is to prepare builders, designers, and acoustical consultants for a future change to the NBC, by providing design guidance in the form of a research report and an online tool. The new research report, RR-332, follows the successful model of the published research report on airborne sound transmission, RR-331, in providing guidance and explanations on how to calculate and combine direct and flanking impact sound transmission. RR-332 uses the method given in ISO 12354-2, adapted to the relevant ASTM standards used in North America. This paper provides an overview of RR-332, how the implementation of ISO 12354-2 is achieved using ASTM standards, and presents several calculation examples. In addition, the future update to the online tool SoundPATHS to calculate impact sound transmission is discussed.
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Mueller-Trapet et al. (2025) studied this question.
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