Need Help With Audio File

For a start, there is no such thing as 'the usual processes'. All audio is different, and you have to decide what it is about the particular bit you are dealing with that you wish to change. The audio you have posted sounds nothing like what I'd expect from a mic, certainly - but without hearing the original, it won't be possible to make any sensible suggestions, I'm afraid.

And if you do decide that you need to process it, then there's an order in which you should do it. I'm a little concerned about your list, because you have it almost back to front. Yes you'd normalize first, but then you'd start with compression (or more likely, limiting), then EQ it if you need to, and only take out any remaining noise after that. Anything you do before compression is going to get modulated by the compression itself, and sound weird - something like your sample, in fact...