Ultrasonic Sensors FAQQIs it possible to prevent false detection of dirt and dust?

Foreign matter, such as snow or dirt, attached to the sensor surface inevitably causes false detection because it reflects sound waves. 
Dirt and dust covering the surface reduces sound pressure and changes sound distribution due to scattering. 
These problems inevitably affect the detection area. 
The open structure type cannot be used in environments where water drops adhere to the sensor. 

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