How to find out the distance to the rear of a car using a parking alarm sensor

It is an effective way to find out the safe point of the rear body of the car, but not all cars have parking sensors like cars that are over 10 years old.
However, it would be good for the driver to know the safe points using parking alarm sensors.
Almost all of the newest cars use at least an alarm sensor, and some already use a reverse camera so it's easier to find out the rear body area of the car.
In alarm sensor parking, there are 2 sounds that must be understood in order to be able to park backwards using the alarm sensor safely and well.
@Hosbas
@alfarizi
@brozacky

[@onilyaya]

Yess komen pertama.. from YayaOte😊

[@Hosbas]

Wkwkwkwkw....
Terima kasih da support

[@OOSakhaho]

Apakah semua parkir alarm bunyinya 2 macam itu kak

[@Hosbas]

sepengetahuan saya sih 2 pola itu boskueee...