When the proximity alarm sounds when getting too close to an object localize the interior alarm sound to match the location of the object.
For example, an obstacle near the front right corner, sound the warning from the front right speaker. This will help the user to know the source of the obstacle without having to divert their eyes to the screen.
From PeeB: I’ve had a scenario where I was reversing alongside a wall, causing the proximity alert to sound (and display). I had to ignore this sound as I was aware of the wall and moving parallel to it, so it wasn’t a problem. As I reversed further and approached an obstacle behind the car there was no change of the audible alert and I hit it!
(voting combined from a close duplicate that has been removed)