Soundproof efficiency and regulations of façade openings on buildings adjacent to transportation systems are investigated in this study. The aim of this study is to learn the international trend on noise regulation regarding to façade openings through literature review. Meanwhile, real soundproof efficiency of façade openings of buildings adjacent to transportation systems in Taiwan were studied through in-situ noise measurement. Five highway and five rail adjacent sites were selected for noise measurement and noise leaking evaluation. Noise measurement results were modeled through CadnaA for each test site. Model validations were carried out under the requirement of less than 3 dBA absolute error between measured and model simulated data. The soundproof need of specific test site was defined as the difference between simulated noise level and expected interior noise level related to the room usage of that test site. Real soundproof quality of façade openings of these test sites were measured following CNS 15160-5 and CEN/TS 1793-5 codes. Window type, quality of material and workmanship were also recorded during field inspection. From all the measurements, it is found that façade openings of new buildings adjacent to transportation system generally don’t provide sufficient soundproof quality. Meanwhile, most of the test sites are suffered from noise leak indicates that workmanship is also a key factor to enhance soundproof quality of façade openings. It is suggested that allowable noise level for various interior usage of building rooms should be established first as a requirement, code for soundproof quality of façade opening should also be established for architects and building makers to follow. Moreover, 43, 29, and 26dBA as the soundproof quality needed for façade openings of bedrooms, living rooms, and offices were found appropriate through this study.

Transportation Systems Facade Opening (Doors,Windows)