An experimental study of automobile interior aerodynamic noise

Based on the analysis of automobile aerodynamic noise generation mechanism and the components of interior wind noise, the variation of interior wind noise characteristics under different wind speeds, different yaw angels and with sealing condition in SAWTC 1:1 aeroacoustic wind tunnel was studied. The result shows that: the spectrum characteristic under different wind speeds is almost the same, The acoustic power of interior noise increases at about 4.7^th and 6.8^th power of flow speed; The acoustic power increased as yaw angle raised especially at the frequency band between 50Hz and 500Hz; Under sealing condition the acoustic power of interior wind noise decreased significantly especially at the mid-high frequency range between 500Hz and 10kHz.