May be "live" a month, survive? Longer or until it rots.

You could smoke it if you have skills. You'd need something sharp, and enclosure to hold smoke in from a fire. A tool or skill to build fire. That is going to draw the attention of the people looking for you. As will rifle shots. Normally it is quite difficult to determine the direction of one shot very precisely. Two shots helps a LOT. Three shots in a row and most people could walk right to them unless they pack up and move VERY quickly and cover their exit trail.

Can't go wrong with a 30-06 remington 700 rifle to hunt or kill anything in north america or your European transplants. People hunt white tails, mule deer, elk in the wild of North America.

You are going to run out of ammo and starve or freeze to death long before any one is going "completely deaf", yet some hearing damage can occur with the first shot especially in enclosed spaces. It affects your sensitivity to hear high pitched noises first and most and it normally takes about half a life time for most shooters even back in the day when no one wore much ear protection. First thing you'll notice is kids and women mumble everything. Then the next hunting season it seems you don't see or hear as much game. May be even the season AFTER THAT you notice it isn't that there is less game, you notice a squirrel on the ground in the dry leaves and you don't hear that. "I should have heard that. The woods used to annoy me listening to all the squirrels and thing they are deer. I wonder how many deer I'm not seeing now because I don't hear them in the leaves and look for them..."