Dynamic stiffness as an acoustic specification parameter for wall ties used in masonry cavity walls

One of the factors affecting the acoustic performance of masonry cavity wal ls is the type of wall tie used in the construction. The dynamic stiffness parameter allows wall ties of equivalent dynamic stiffness to be identified without involving other variables involved in laboratory airborne sound tr ansmission across masonry cavity wall constructions such as cavity damping and structural coupling at the boundaries. This is useful when one type of wall tie is established in national building regulations and architects or construction companies require the use of non-generic wall ties. (C) 1998 T he Building Research Establishment. Published by Elsevier Science Ltd. All rights reserved.