Authors: X Han Y J Guo H D Yu P Zhu
Publish Date: 2009/02/10
Volume: 10, Issue: 1, Pages: 79-85
Abstract
Panel acoustic contribution analysis PACA is a practical engineering tool for the reduction of interior structureborne noise in passenger cars In this study the current PACA method has been improved for sound field refinement of the entire interior Two new parameters the “acoustic contribution sum” and the “total sound field contribution” are introduced to analyze the interior sound field characterized with multiple field points and sound pressure peaks and to evaluate the integrated acoustic contributions of auto body panels In addition a systematic methodology for automotive interior sound field refinement is also proposed on the basis of the modified PACA method An example of a passenger car model demonstrates the application of the soundfieldrefinement methodology and shows the advantage of using damping layers at optimum locations on the auto body The example also shows that the modified PACA method has practical significance for refining the interior sound field and decreasing added mass in accord with the trend towards lightweight auto bodies
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