Modular construction is a method in which building components are manufactured in a factory and assembled on-site. This approach offers advantages in quality control, particularly in ensuring the structural integrity of key building elements. However, unlike conventional reinforced concrete (RC) structures that are monolithically cast on-site, modular buildings are inherently segmented due to their off-site fabrication and on-site assembly. This segmented nature may influence the transmission characteristics of impact sound in multi-family housing. In this study, to examine these characteristics, floor impact sound measurements were conducted in accordance with ISO 16283-2 using a standardized rubber ball impact source. Both sound pressure levels and floor vibrations were analyzed to assess the acoustic performance of these structures. The results enhance the understanding of floor impact sound behavior specific to modular construction and inform guidelines for acoustic design and regulation in off-site residential building systems. Work supported by the Korea Agency for Infrastructure Technology Advancement (KAIA) (Project No. RS-2025-02307141).
Hong et al. (Wed,) studied this question.