Help fixing underwater "tin room" sound

Question

Hi Folks, I'm hoping you can help me.
One of my instructors recorded a full e-Learning class on a Blue Yeti. Later, we found that the microphone was having issues. The problem is she put a couple of days of work into it.
Here's a WAV snippet
It has a very underwater "tin room" sound to it. I'm wondering if anyone can offer advice to make it sound... well, passable. It doesn't have to be perfect.
I have a little bit of experience with sound programs, but am still a beginner, so please take it easy on me.
Any help would be super appreciated.

Answer 1

davidlieb wrote:
The audio wasn't originally recorded into Audition. I was just hoping to use Audition to fix it. It was originally recorded into Camtasia, which is a video screen capture program for eLearning. It does have a noise reduction feature, but my team swears they haven't turned it on, and looking at the file in Camtasia I can see that it's not on. It is possible, I guess, that noise reduction was applied and saved in some weird way. 
Hmm... you need to look very carefully at the settings, I'd say. And get people to check the output quality of the recordings they make before proceeding too far with them...
I'm also trying to track down the laptop the recording was made on (we have several we check out when needed) to see if maybe there's a sound card issue. 
Won't be a sound card issue, because the Yeti doesn't use it - it's a USB mic that does its own digitising, and provides a stream that can be recorded directly. There's no other way it can work. And anyway, listening to the actual mic sound reveals that it's not actually a faulty digitisation - it's too clean behind all of that noise for that to be the problem.
I am hearing correctly that you guys feel like there is no helping this file, though, right?
That's certainly the case with the file as presented, and if there really is no unprocessed version then that's what you are stuck with, yes.
If you are just going to do mic recordings, you'd be better served by doing them directly into Audition anyway - it simply can't make that sort of mess of a recording, quite deliberately. This is because it complies with standard industry practice, which is always to record dry whenever possible.
Sorry if this is perhaps a little forensic, but that's the way it is!