An Experimental Study on The Coupling Path and Acoustic Modal Characteristics of Passenger Compartment - Trunk Coupled System

차실-트렁크 연성계의 연성경로 및 음향모드 특성에 관한 실험적 연구

Acoustic modal property of the vehicle passenger compartment is a very important factor which dominates vehicle interior noise in the low frequency range. In most real cars, trunk noise often transfers into the passenger compartment since the two cavities are acoustically coupled. This study identifies the major coupling path by examining the variation of the coupled acoustic modal frequencies and modes. An 1/2 size acryl compartment model is designed and manufactured for the measurement and analysis of coupled acoustic modes. Experimental result shows that package tray contributes to the coupling much more than the back seat and hole size of the package tray is an important design factor to control low frequency acoustic modes in the coupled system.