Abstract: Wind tunnel tests on the aerodynamic acoustics of a vehicle are carried out to study the change of interior aerodynamic noise, evaluated by A-weighted sound pressure level (SPL), loudness and articulation index (AI) three indicators respectively, under different wind speeds and yaw angles and the effects of rearview mirror sealing and wiper on interior noise. The results show that the frequency spectrum characteristics of interior aerodynamic noise under different wind speeds are similar. As wind speed goes up, the A-weighted overall SPL and loudness of interior noise increase almost linearly, and AI linearly decreases, while with the increase of absolute value of yaw angle, the interior A-weighted overall SPL and loudness rise and AI lowers, but with a less obvious linearity of rise and fall. In addition, the rearview mirror sealing has larger influence on interior noise at middle-high frequency range (500Hz-3kHz), while the effects of wiper are mainly at high frequency band (3kHz-6.3kHz). From the numerical point of view in analyzing the influences of both rearview mirror sealing and wiper on interior aerodynamic noise, AI always more sensitive than A-weighted SPL and loudness

Key words: aerodynamic noise, objective evaluation, wind speed, yaw angle, rearview mirror sealing, wiper