Bsly

I'm guessing a wall mount won't work, but have you thought about a projector you could hang from the ceiling?

Noise cancelling works primarily on constant sounds. Not sure what your use is but a pair of closed back headphones may be all you need. Some of them block out pretty much all sound. It would allow you to get a nicer pair of headphones. The audio Technica athm50x is my primary cans and I've seen the bt go as low as 130 range but they are normally 180 to 2. The wired ones go for 150 normally but might hit your budget on sale. If you are dealing with loud sounds they won't be enough. Good luck