Comparison of sound isolation performance of floor/ceiling assemblies across structural systems

Abstract

The recent building boom in greater Boston has given rise to multifamily buildings utilizing a wide range of structural systems, including cast-in-place concrete, pre-cast concrete, steel, heavy timber, and various wood frame structural systems. Both laboratory and field measurements indicate that typical floor/ceiling assemblies utilized with each structural system have certain characteristic acoustical attributes. Although these assemblies perform differently, virtually all of these structural systems have been utilized in buildings advertising “luxury” residential living. This presentation compares recently obtained sound isolation data among the various structural types. Specific acoustical design challenges and constraints (such as budget, available floor-to-floor height, and others) are identified, and guidelines for achieving sound isolation commensurate with a “luxury” standard are outlined for each of the structural systems examined.