Publication: Boundary element analysis on the cabin sound study
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Date
2023-07-07
Authors
Aidiq Tham bin Khairul Ikhwan
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Abstract
The interior acoustic environment of automobile cabins can be overwhelming in terms of the comfort and the pleasantness of users’ driving experience either urban or suburban driving. Excessive cabin noise can lead to discomfort, fatigue and even hearing damage for passengers and crew members. In this background of this study, the analysis of mini truck cabin is studied intensively to evaluate the noise levels using the relatively new comprehensive computational tool software which is Siemens Simcenter 3D by using Direct Boundary Element Method (DBEM) utility. Nevertheless, very limited literature reviews or research that explores Boundary Element Method (BEM) to adopt cabin acoustic study involving interactions with boundaries via simulation. Therefore, this study entails the investigation of the transmission paths of the noise sources into the mini truck cabin and highlights the relevance and potential of DBEM application in acoustic study. The BEM is a good substitute for the FEM in the field of linear acoustics that strikes an excellent adjustment between the frequency range of application and forecasting the established complex variables more precisely. Also, the surface meshing required under BEM ease the preprocessing times and runtimes. The objective metric which is Transmission Loss (TL) as acoustic measurements and analysis are employed to estimate the noise outcome and determine the importance and insights of cabin’s noise control measures. Considering this, simulation based on BEM for mini truck cabin with and without acoustic absorber will be made to breakthrough the promising BEM capabilities for viable noise control solutions and optimize the placement of absorbers for optimal noise control.