Following the engine, the tires form a particular source of noise nuisance in the car. Engine noise from passenger cars dominates up to a speed of about 40 to 45 km/h. At higher speeds you mainly hear driving noise. By insulating the wheel arches, you can counter driving noise. In part 6 of our showcase we will show you how we applied this to the Himmer H1.
The driving noise of the wheel arches is caused by vibration that the wheels transmit to the body of the car. This is contact noise. Apart from this type of noise nuisance, nuisance may be caused by the encapsulating and escaping of air between the road surface and the tires. This is also referred to as the air-pumping-effect (ZOAB asphalt greatly reduces this effect). This noise also enters via the wheel arches.
By attaching sound insulating anti-drumming plates to the wheel arches this driving noise is being countered. Anti-drumming includes adding mass to the sheet metal. As a result, the rigidity of the body increases, reducing the amount of driving noise that can enter the interior. Products such as Vibraflex, StP StandartPlast, Vibradam A90-P and Silent Running are ideal products for anti-drumming steel, aluminium, polyester, wood and plastics. These sound proofing materials ensure that the substrate (like a wheel arch) won’t start to resonate as quickly. As a result you will perceive less driving noise inside the car.
Let’s take the example of a gong (musical instrument) in order to explain how anti-drumming works. When a gong hangs freely you will hear a clear sound when you tap on it. When you hold the gong with your hands, on the contrary, you will hardly hear any sound when it is being tapped on. As for the anti-drumming of the wheel arches, we try to achieve a similar result. Moreover, the material that we use has a sound insulating effect. Apart from resonance, noise is also being blocked.
Tips for insulating the wheel arches of your car
The best way to insulate your wheel arches is by covering them with Vibraflex Extreme or STP Aero. You install these sound proofing materials at the inner side of the vehicle. Thoroughly degrease and cleanse the wheel arches first, and then equip their entire surface with these products. After the wheel arches are equipped with anti-drumming products they can be finished with acoustic covering like Isomat FM floor mat. This is a nice sound proofing mat with a wear-resistant top layer. The bottom plate can be covered with this as well.
More information about insulating vehicles
On our page with solutions regarding vehicle insulation you will find the most common problem areas. Additional tips pages about various types of vehicles you will find here:
Do you need personal advice?
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