Abstract
In newly completed buildings, or following modifications and alterations, it is often necessary to determine if the dividing wall meets the required acoustic specifications. The conventional methods for the determination of the field transmission loss are complex and time-consuming and normally only the measurement of noise reduction is attempted. The sound intensity method can be used for determination of the field transmission loss and offers the advantage of providing the transmission loss data for elements of walls, such as doors and windows. The acoustic characteristics of the receiving room are not critical—if necessary, absorption can be added and this is much easier than providing a reverberant space. The sound intensity method has shown good correlation with the conventional methods for laboratory test procedures. The results from some field sound transmission loss measurements of composite partitions using the sound intensity technique are presented. Comparisons are made between results obtained by the sound intensity technique and the conventional method. The importance of the experimental procedure is discussed.
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