Tranquility is an important element for our well-being in everyday life. When it comes to architectural sound insulation, achieving indoor quietness can be a challenge, especially for urban areas with dense population and heavy street traffic. In buildings, windows are generally more susceptible to noise penetration than other partitions because of their lower surface mass. Fortunately, engineered interlayers in laminated glass can effectively dampen sound propagation and reduce the overall sound transmission. In this paper, the technology involved in acoustic glazing will be presented from a physics perspective. The physical processes of sound transmission through solid panels will be reviewed and the technical approaches to enhance sound transmission loss of laminated glass will be discussed. Lab tests as well as numerical simulations have been conducted in order to optimize the construction for architectural acoustic glazing.
Results will be reviewed to evaluate the dependence of sound transmission loss on interlayer properties, glass-interlayer composition and overall geometrical structure of the laminate.