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Ultrasonic device could keep rain and dirt off windshield...
"I was told that it's not a coating on the surface but a high frequency electronic system that never fails and is constantly active," he said. "Nothing will attach to the windscreen."
... there has been widespread media speculation that the system would generate high-frequency sound waves or ultrasound, similar to those produced by devices that dentists used to remove tartar from people's teeth, or that are used to clean objects ranging from medical devices to jewelry.
Is this safe? Will it effect the driver or people around the car negatively, both mentally or physically? Oh that's right, no testing on that is required in this world, if you get sick it is your own fault.
Wow, even though this technology will likely take years to reach assembly lines, this is quite the advancement (for cars at least as this is already in use in military vehicules).
You beat me to it but I'll agree that you don't need wipers above 25mph if you recently applied RainX. I didn't find it all that hard to see even below 25mph but it was definitely better visibility above 25mph. I think the performance also depends on things like the angle of the windshield, airflow around the car, etc.
If the makers of RainX* could perfect their Formula to Work more efficently at lower speeds , say Zero to 25 MPH , then there would be no need for this obvious Expensive Technology .