How to stop roof rack noise - loadyourgear The Problem: Why Does My Roof Rack Make A Noise?The SolutionsThe FutureThe wind noise we hear from some roof racks is known as Aeolian noise and is produced by wind when it passes over or through objects. If the surface the wind passes over has a consistent shape, the disturbance becomes tonal and at certain frequencies very annoying. The amount of noise depends on the speed of the airflow (how fast you are driving) and the drag coefficient of the cross bar. The higher the drag coefficient, the more noise is created. If you compare the different shapes of cross..See more on loadyourgear How to Stop Noisy Ladder Racks | It Still Runs Wind noise is a big concern among those who have ladder racks installed on their vehicles. As a non-aerodynamic portion of the vehicle's bed or roof, air rushing around the front cross bar and other portions of the ladder rack can produce loud noises that intrude into the cabin of the vehicle.