It is well known that the impact sound improvement for floor coverings on lightweight floors is very different from that on heavy concrete slabs.
At present there is no test method, which addresses this problem but an ISO working group has recently proposed a method using three different standardized lightweight floors.
One problem with this proposal is that it is not cost efficient. Most laboratories have only one test opening and it is expensive to change floors. Thus it would be preferable if it were possible to use a simpler test procedure. In this paper such a procedure is outlined and discussed.
The procedure involves measurements on a small lightweight construction only and it is placed on top of the standard concrete floor. Some examples showing the results of this simple procedure are given and it is concluded that the procedure is promising.
A proposal for Nordtest method is given and it is finally tested in a Nordic Round-Robin.