Soundproofing Floors Phase 1: The Underside of the Floor (CMHC Canada Mortgage and Housing Corporation)

Soundproofing Floors Phase 1: The Underside of the Floor (CMHC Canada Mortgage and Housing Corporation):

Sound transmission between floors is acommon problem in multiple-unit dwellings. To find effective and economical ways of resolving this problem, CMHC initiated aresearch project on the sound isolation provided by floor/ceiling assemblies in wood construction.The first phase of this study, described here, investigated the acoustical performance of different materials incorporated in the underside of floor/ceiling assemblies. These included sound absorptive materials in the floor cavity, as well as ceiling finishes and installation methods. The results of these tests are presented in the following table, which contains diagrams of the assemblies tested and their detailed composition, Sound Transmission Class (STC) ratings and Impact Insulation Class (JIC) ratings. The higher the STC andJIC rating, the better.