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The Sound of Wind Is Loud When the Window/Sunroof is Open While Driving
1. When the window / sunroof is open during driving, the passenger cabin
becomes a cavity. The car body surface and the cavity will form an acoustic
resonance and produce a noise.
2. When the window / sunroof is opened, the seal system of the whole vehicle
is ineffective to a certain extent and cannot play the role of isolating the
external sound source from the passenger cabin.
3. When the window / sunroof is opened, the sound is directly actuated by the
passengers’ ears, and the subjective feelings of passengers become
stronger.
That is why opening the window or sunroof when driving will cause greater wind
noise. We recommend that you avoid opening the windows / sunroof while
driving, especially at high speed driving. This good driving habit can also
save fuel consumption.
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When Driving Under the Following Circumstances, Certain Sounds Become
Louder
1. Driving on cement road: Your tires sound louder on a cement road than on
asphalt because of the honeycomb shape of asphalt pavement. The shape produces
a sound-absorbing effect and creates has less contact area with the tire.
2. When there are obvious reflectors around (for example, through tunnels):
Under normal circumstances, noise generated by vehicles while driving is
radiated and dissipated to the surrounding area. When there are obvious
reflectors around the vehicle, noise that should have been reflected to the
surrounding area is instead directed towards the passenger cabin.
3. Driving in the windy weather: In the design and manufacturing process, our
vehicles have experienced numerous wind tunnel tests and design verification,
but we focus on wind directions of 0 to 20 degrees. Without a doubt, when
driving in windy weather, there will be more lateral wind disturbances. When
lateral wind disturbance is greater than 20 degrees, it will generate a louder
wind noise than in normal driving conditions. When you’re also driving against
the wind, airflow speed equals the wind speed plus the car speed, which
produces greater wind noise than in normal conditions.
4. Ultra high speed driving (greater than 160KPH): One of the basic
characteristics of wind noise is that it increases with the increase of speed.
Wind noise generated at high speed driving is certainly louder than that at
low speed. Plus, ultra-high-speed driving is not conducive to safety and is
also prohibited by law.
5. Driving on a special road, for instance a deceleration belt: When driving
on special roads like a deceleration belt, the road surface is deliberately
designed to actuate the vehicle vibration and sound to get the driver’s
attention.
6. Tire pressure is too high: When tire pressure is too high, it will cause
the cavity resonance of the tire and the increase of road vibrations to the
car body, which causes loud tire noise.
7. Cold weather: In cold weather, the hardness of the car’s sound insulation
and vibration isolator will increase to some extent, thus causing the noise to
increase