Min Hequn, Wang Bo, Qu Ting
Key Laboratory of Urban and Architectural Heritage Conservation, Ministry of Education, School of Architecture, Southeast University, 2# Sipailou, Nanjing, 210096, China.
Sci Rep. 2024 Dec 23;14(1):30584. doi: 10.1038/s41598-024-82403-w.
Lightweight double leaf walls have been extensively employed in assembly and large-space buildings. Due to the complex and varied stud configurations in double leaf walls, accurately and efficiently predicting the sound transmission loss (STL) of such structures poses a significant challenge. To support performance-based design workflows, this paper presents an analytical model based on sound transmission path decoupling, enabling architects to quickly predict the STL of commonly used lightweight double leaf wall types, including wooden, steel, and acoustical stud constructions. The paper systematically discusses the impact of different stud configurations on sound insulation performance and reveals the underlying mechanisms of sound bridge effects. Results show that the sound bridge effect arises from the structural sound transmission path introduced by various types of studs in the wall, and optimizing stud configurations is essential for decoupling the two leaves of the wall acoustically. Traditional wooden studs, considered as rigid frames, contribute more to the sound bridge effect compared to steel studs of the same structure. A promising approach involving acoustical studs with rubber sound isolation inserts is proposed, which achieves high-level sound insulation performance while offering significant spatial and construction efficiency advantages. This study provides valuable insights into advancing high-performance, lightweight building partitions and contributes to enhancing indoor soundscapes.
轻质双层墙已广泛应用于装配式建筑和大空间建筑中。由于双层墙中立柱配置复杂多样，准确、高效地预测此类结构的传声损失（STL）面临重大挑战。为支持基于性能的设计工作流程，本文提出了一种基于传声路径解耦的分析模型，使建筑师能够快速预测常用轻质双层墙类型（包括木质、钢质和吸音立柱结构）的STL。本文系统地讨论了不同立柱配置对隔音性能的影响，并揭示了声桥效应的潜在机制。结果表明，声桥效应源于墙体中各类立柱引入的结构传声路径，优化立柱配置对于使墙体的两层在声学上解耦至关重要。与相同结构的钢立柱相比，传统的木质立柱被视为刚性框架，对声桥效应的贡献更大。提出了一种采用带有橡胶隔音插件的吸音立柱的有前景的方法，该方法在实现高水平隔音性能的同时，还具有显著的空间和施工效率优势。本研究为推进高性能轻质建筑隔断提供了有价值的见解，并有助于改善室内声环境。
