How can you to avoid the noises if the led light bars are installed onto top of cockpit of the vehicles

When LED light bars are installed on the roof or top of a vehicles cockpit, a driver might hear a loud, annoying whistling, humming, or vibrating noise on the highway.

In order to reduce the noises arise from wind whistling or roof vibration, you can consider the following solutions from the easiest fix by installing rubber silences or isolators, adding an aerodynamic wind deflector, disrupting the airflow with wrapped cord to adjusting the mounting position.

First, you can slide rubber inserts silencers directly into the gaps of the cooling fins on the back of the light bar. These disrupt the airflow and absorb vibrations.

If you dont have manufactured inserts, choose standard automotive rubber edge trim  and press them onto the edges of a few fins will achieve the same result.

If the noise is a deep hum or vibration caused by air trapped between the light bar and the roof, you can attach a small, angled plastic or metal shield to the bottom or front of the light bar, which can direct the oncoming air over the led light bar

Sometimes, simply turn the light bar down by just 1 or 2 degrees changes the aerodynamics enough to stop the buffeting without affecting your flood beam pattern during night driving.

Another highly effective solution is wrap the led light bar spirally around the entire length of the led light bar housing. This will break up a clean, high speed laminar airflow into turbulent air, which will prevent the harmonic resonance that causes whistling.

Finally, if your mounting brackets allow, try lowering the led light bar closer to the roofline or moving it slightly further back from the top edge of the windshield.

If the led light bar is sitting just an inch above the roof, filling that specific gap or adding foam padding under the mounting brackets can stop the roof panel from acting like a drumhead.