TY - JOUR AU - Lorimer, Alex AU - Tinianov, Jessica PY - 2015/08/18 Y2 - 2024/03/29 TI - STC Ratings of Drywall Partitions with and without Structural Sheathing JF - Canadian Acoustics JA - Canadian Acoustics VL - 43 IS - 3 SE - Proceedings of the Acoustics Week in Canada DO - UR - https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2760 SP - AB - It is often encountered that architects or other building designers specify multiple cavity partitions, with the expectation that they provide equal or greater sound transmission loss performance than a single cavity partition of similar overall mass and dimension. Previous studies confirm that this is not generally true. In particular, the National Building Code lists wood-frame and drywall demising partitions with single large cavities and relatively high Sound Transmission Class (STC) ratings; however, a footnote indicates that the structural sheathing configurations in these walls can degrade the performance from slightly to unpredictably. This article presents a comparison of several field measurements demonstrating the significant acoustical effects of a commonly specified sheathing configuration. ER -