Characterizing the acoustic properties of sound-absorbing materials is costly and time consuming. The acoustic material database helps the automotive designers design their interior trims in accordance with target level for interior noise. In this paper, a two-microphone impedance tube was used to measure the normal sound absorption coefficient. The main parameters that are used in the theoretical model for interior noise level assessment are investigated. These parameters include thickness, airflow resistivity, porosity, tortuosity, viscous and thermal characteristics length. The measured results have been validated by the theoretical models. The validation of normal sound absorption coefficient was found to be in agreement with its corresponding measurement data. Finally, the sensitivity of the sound absorption coefficient which is related to the physical properties mentioned above is further analyzed.
Development of an Acoustic Material Database for Vehicle Interior Trims
Sae Technical Papers
18th Asia Pacific Automotive Engineering Conference ; 2015
2015-03-10
Conference paper
English
Development of an Acoustic Material Database for Vehicle Interior Trims
British Library Conference Proceedings | 2015
|Recycling Technology of Surface Material for Interior Trims
SAE Technical Papers | 2000
|High Performance Unfilled Polypropylene Material for Light Weight Interior Trims
British Library Conference Proceedings | 2022
|High Performance Unfilled Polypropylene Material for Light Weight Interior Trims
SAE Technical Papers | 2022
|POSITIONAL REGULATION STRUCTURE FOR VEHICULAR INTERIOR TRIMS
European Patent Office | 2017
|