Abstract
AbstractThis article focuses on the effect of different foaming process on acoustic performance of a vehicle with a typical vehicle lightweight floor carpet. The carpet structure difference between 2 different foaming processes was discussed firstly. A statistical energy analysis (SEA) based transmission loss model was developed to predict the sound transmission loss (STL) under different boundary conditions. It was found that the STL of the carpet with direct foaming process is much worse than the separate foaming process carpet when the boundary condition was Bonded-Bonded. Then a full vehicle SEA model was developed to predict the sound pressure level (SPL) at the front-left (FL) driver’s headspace. In parallel, a test was conducted to measure the SPL response at the same space after the floor was assembled on the vehicle. The test results showed the good agreement with the simulation results.KeywordsFloor carpetLightweightFoaming processAcousticSimulationSEASTL
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