Decibel level tire noise rating chart4/17/2024 The main phenomena generating noise are as follows: As the tyre rotates, it is constantly deformed, and its tread blocks hit the ground. Noise emitted by tyres is particularly annoying in big cities.ĭuring the car's movement there is a constant interaction between the wheel and the ground. At this point, it is worth drawing attention to how important for the drivers’ comfort is the cooperation between tyre and car manufacturers and specialists building roads. In many cases, the tyre noises are also due to errors, shortcomings or deliberate decisions of the manufacturers (in order to raise other, more important feature - for example, adhesion). To summarise, it is important what we drive (car), on what surface (road roughness, frequency of transverse faults in the roadway, etc.) and with what tyres. ![]() This may be the reason why one tyre model is considered by some drivers to be quiet, and by others to be loud. An even bigger problem is when the frequency is additionally close to one of the car's resonant frequencies. Then, the tyre instead of absorbing vibrations and noise strengthens them. The problem occurs when this frequency is close to the frequency at which forces are applied (resulting, for example, from road roughness). ![]() What are the sources of tyre noise?Įach tyre has its own resonant frequency, that is, the frequency at which it trembles the most. In this article, we will focus on the latter. Using silent tyres (a car driving on quieter tyres emits up to three times less noise than the same car on ordinary tyres). The car user may also have an impact on reducing traffic noise. Most often, the noise is reduced by limiting the speed on highways and motorways which run close to places inhabited by people. Unfortunately, they are on average 2.5 times more expensive than regular ones. Noise can also be limited by the use of modern surfaces that reduce its level by as much as 7-10 dB (A). Traffic noise has become a serious problem in the field of environmental protection and this is why its level is described on tyre labels. The accumulated noise made by tyres of dozens of passing cars, causes these people to be constantly in a noisy environment. It turns out it is annoying mostly for people who live by the roads. Noise can be troublesome not only for the driver, but also for the environment. In the speed range from 50 to 120 km / h, tyres are the main source of noise emitted by a moving car. Basically, the more the source trembles, the more noise it generates. The source of vibrations can be a solid object (in this case a tyre), which stimulates the air to vibrate, creating pressure waves around it. Sound is the vibrations propagated in the air in the form of sound waves. Noise should be understood as the sound level causing an unpleasant auditory experience or even disturbing the driver, passengers and the environment. ![]() The noise made by tyres while driving can ruin the pleasure of travel. Traffic noise is unfortunately a frequently neglected problem.
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