The two most important axes that influence driving relaxation during a trip are ride quality and the NVH (Noise, Vibration and Harshness) index, where in automotive language this means noise, vibration and speed.

A study involving thousands of people over four years found that those exposed to road noise above 70 decibels (dB) were at 65% more risk. depression. Measurements have shown that the quieter the car is inside, the more competitive it is compared to the competition. In fact, they prefer it 26% more than another noisier car. Of course, this all has to do with the frequency of the noise and the position of the passenger inside the car. Ride quality is another key variable that affects the driving experience. The smoother the ride, the smoother the journey.

Today, most companies invest in this part during production, using special foam materials to reduce noise levels and thus increase the level of the drive roller. Now, models that are quite noisy on the road respond negatively and are put at a disadvantage compared to competitors.

Usually, when the vehicle goes through the first years of operation, due to the vibrations of its movement, its connections acquire a rarefaction, as a result of which noise in the cabin increases. In some cases, especially when the car’s engine is particularly powerful or lately we’ve been seeing three-cylinder engines that are naturally noisier than four-cylinders, more noise is created, which can become tiresome. On the other hand, poor factory soundproofing can lead to the same results.

When a quality audio system is installed in a car, the owner naturally wants to enjoy the quality. But when there is audio loss, things get more complicated, and outside sounds can ruin your listening experience.

For each manufacturing company, the optimal solution is to use soundproofing materials to soundproof the car. The use of soundproofing materials is carried out in certain parts, isolating engine noise, as well as aerodynamic noise outside the cab. Common places where soundproofing is applied are the hood, roof, windows, wheel arches, cab floor, luggage compartment, tailgate and mirrors. Great importance is also attached to the connection points to the engine and cab, where each source of noise is acoustically isolated, providing the best possible sound isolation.

Source: RES-EMI