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Observation: Tire size directly determines tire noise level

Posted by: AutoMotive 2021-11-14 Comments Off on Observation: Tire size directly determines tire noise level

The roughness of the road surface, the structure of the road surface and the material of the road surface are the factors that affect the level of tire noise. In addition, the width of tires and wheels also restricts the difficulty of noise reduction. Wide tires will become more noisy due to the wider bearing surface. Compared with those with narrower dimensions, wide tires will squeeze more air and push. More “air masses” generate vibrations.

For a car with a front engine, passengers sitting in the back row will be more likely to perceive the rolling noise of the tires, because the rear of the body is relatively less affected by engine noise and wind noise. At this time, tire noise will be prominent. So when we judge the fetal noise, we mostly choose to sit in the back row for screening.

The rolling noise that human ears perceive is that the sound source oscillates continuously through the air medium and then enters the ear. Due to changes in certain characteristics and factors, tire noise will sometimes increase or decrease, which can basically be summarized as the combination of road and tires. Pavement structure and materials have a significant impact on tire noise. For example, when a vehicle passes on a wet road, the noise decibel level is significantly higher than that when a vehicle passes on a dry road.

The pattern design of the tire itself also plays a leading role in tire noise. For example, the pattern groove of a tire is 90 degrees, and the pattern of the same car is designed with an acute angle. We can also easily compare that tires with a 90-degree groove pattern are more serious in terms of tire noise.

The wedge rib tire is not stable enough when driving, because it will have a large deformation effect during the rotation process, it will generate air vibration when pushing and squeezing the air, and when the vibration is strong, it will pass through the air. The medium reaches our ear drum.

Wide tires are noisy, and the friction surface increases, and the noise also increases. The same is true for the pattern design. Many high-performance tires generally use larger “herringbone” drainage patterns. The most familiar series we are familiar with is “** flying boots”. The pattern grooves of this type of tires will also be constant. Squeezing and squeezing the air, the resulting vibration must be greater than that of ordinary pattern design. If the noise resistance of the body seal is not good, tire noise will directly affect the driving comfort of the vehicle.

The size of the tire directly determines the level of tire noise, and the design of the tire pattern is also a major factor that cannot be ignored, because the grooves between the tire treads will squeeze and push the air to vibrate, and the extraction of air will also deform the pattern. Maybe It’s compression, maybe expansion.

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