[ian321]

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Parking Sensors are a technology that allows the
driver of an automobile, truck, or commercial vehicle to be alerted to nearby
objects in their path. Parking sensors are also known as backup sensors,
parking sonar or just sonar depending on the automaker.

Ian Roger
Parking Sensor

 

[ian321]

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The most common form of feedback to the driver
in a car with parking sensors is audible "beeps" and/or tones.
Generally, the frequency of the beep indicates distance from an obstruction,
with the beeps becoming faster the closer the vehicle moves to an object.
Ian Roger
Parking Sensor

 

[ian321]

Nice comment.
================
John
Parking Sensor