Hi guys hoping someone could enlighten me with various noises i hear on the car

1. Rear door behind driver clunks. Once it has been opened and hit the stops upon closing it makes the clunk. It only does this once in a sequence of opening/closing and won't do it again until several hours have past 

2. Load deep sqweek type noise happens every so often once I've stopped, and started to reverse. It sounds like the pads are very lightly binding on the disks.

3. Parkibg sensor volume. Anyway to increase this? 

Any thoughts on the above very much appreciated 

You need to try and locate where the reverse bleeper is and look at it to see if it has a volume on it. I know a lot of after market ones do but not sure on factory.

I wear hearing aids most of the time but even when I do not put them in (normally weekend) I am still able to here both the front and rear bleepers.