ABSTRACT
In buildings with traditional heavy constructions of concrete or masonry, about 50 % of the sound transmission between rooms with a common dividing partition is flanking transmission. This chapter discusses the principles of flanking transmission on four different types of building. The number of transmission paths to be considered is often quite high, so there is need for a computer program to handle this in a reasonable way. For each set of flanking surfaces, there are three flanking transmission paths, i.e. with four flanking surfaces, there are 12 transmission paths in addition to the direct transmission. The flanking constructions and the junctions between the constructions are of high importance for the sound insulation between rooms. The number of transmission paths to be considered is often quite high, so there is need for a computer program to handle this in a reasonable way.
