This is most common on jeep wranglers as the shape of their windscreen makes this a common problem.
Roof mounted light bar wind noise.
If the surface the wind passes over has a consistent shape the disturbance becomes tonal and at certain frequencies very annoying.
The simple installation process is designed to work with most standard heat sink led light bars and will virtually eliminate wind noise caused by the airflow passing around the light bar.
The zroadz patented noise cancelling wind diffusers provide an easy method to silence noisy roof mounted led light bars.
The best way to get rid of this problem if you must mount your light bar in this position is to purchase some flyscreen spline from a hardware store and press it into the gaps between the fins on the back of the bar.
The simple installation process is designed to work with most led light bars and the patented design will virtually eliminate wind noise caused by the airflow passing around the light bar.