Sound Deadening question

So if I'm going to sound deaden the doors, do I do the inside of the door, along the inside skin, or is it better to do on the panel of the door closest to inside the truck where speakers mound too?

 

What is your goal with sound deadening? Are you trying to improve sound? Just keep road noise out or both?

 

both?

 

When I installed mine, I removed the plastic sheet and put them on the backside of the door, closest to outside. Little PITA but results are worth it.

 

When I was doing this, I did the actual insides of the door. I've seen multiple different answers from different people about where you should put it and how much you should put, etc etc. I ultimately just lined the majority of the inside of my door skin with the sound deadening and left it after that. It was a PITA but worth it.

 

Doing mine, I did the outer skin, then covered the access holes and did the interior side as well. Did this only for improved audio performance.

 

Thanks for the input.
Looks like I've got my work cut out for me.