The article discusses an empirical method for predicting the Sound Transmission Loss (STL) performance of Sound Barrier Assembly (SBA) materials that are commonly used in the automotive industry. The prediction method is based on basic STL theories of single and double-wall systems, in conjunction with the double wall resonance and the standing wave resonance between the two walls. In addition, a practical technique for determining the acoustical influence of the decoupler in a double-wall system is proposed. When all these considerations are put together properly, one gets a much clearer picture of the STL characteristics of typical double wall systems, and understands how the barrier and decoupler together affect the STL performance. The validity of the empirical prediction method is substantiated by comparing predictions with measured results of more than 60 samples.
Sound transmission loss prediction of double-wall barrier assemblies
Sound and Vibration ; 31 , 7 ; 18-27
1997
10 Seiten, 16 Bilder, 7 Quellen
Aufsatz (Zeitschrift)
Englisch
Empirically Predicting the Sound Transmission Loss of Double-Wall Sound Barrier Assemblies
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