däckljudet

Däckljudet, often translated as tire noise, refers to the sound produced by the interaction between a vehicle's tires and the road surface. This phenomenon is a significant contributor to overall traffic noise pollution, especially in urban environments. The primary sources of däckljudet are generally categorized into two main types: surface noise and air pumping noise.

Surface noise arises from the complex mechanical interaction as the tire tread elements come into contact with the irregularities of the road surface. This includes the deformation and vibration of the rubber and the road material, as well as the impact of the tire on small asperities. The texture and composition of the road surface, as well as the tire's tread pattern and compound, play crucial roles in determining the intensity and frequency characteristics of this noise.

Air pumping noise, also known as forced air expulsion, occurs when air is trapped and then rapidly expelled from the voids between the tire tread and the road surface. This effect is more pronounced with coarser road surfaces and specific tread designs that can create effective air pockets.

The level and quality of däckljudet can vary considerably depending on factors such as vehicle speed, tire pressure, tire wear, and the type of road surface. Reducing tire noise is a key objective in vehicle and infrastructure design to mitigate environmental impact and improve the quality of life in residential areas.