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Sound transmission through lightweight double-leaf partitions: systematic parametric analysis and application
J. Wang*, T. J. Lu*, J. Evans**
*Department of Engineering, University of Cambridge
Trumpington St., Cambridge CB2 1PZ, UK
**Banro Sections Ltd., Manor Works, Pleck Road
Walsall, West Midlands WS2 9ES, UK
CUED technical report, CUED/C-MICROMECH/TR.91, February.
This paper presents numerical analysis of sound transmission loss (STL) through
double-leaf partition walls stiffened with periodic placed steel studs. Although the present
model is derived in two-dimension, the comparison of predictions from the model with
experimental data demonstrates that the model can predict the trend of STL through partitions
correctly. The model successfully predicts the effects of three characteristic frequencies:
mass-air-mass resonance, bridge frequency and coincident frequency. Systematic parametric
studies further demonstrate that this model can be used as a preliminary tool for STL analysis
and guiding the design of double-leaf partition walls. A prototype acoustic stud is designed
and analysed.
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