Vibration reduction index K{sub}(ij) for junctions of building elements with cavities

摘要

The airborne and impact sound insulation between rooms can be predicted from the acoustic performance of the building elements, like walls and floors, and the acoustic performance of the junctions between these elements [1,2]. To express theacoustic performance of junctions a new quantity was introduced, the vibration reduction index k{sub}(ij). Measurement methods for this quantity are under development, while for most common types of junctions estimations can be based on the results ofearlier research work. However, for building elements with cavities no method for estimation is readily available. A possible approach will be discussed in this paper.