It's just a loud fan, I knew it would be. I have a little pwm motor controller that I can use so I can turn it up and down as needed.Bravo some of the noise could be from the blade passing the guard supports. Since it is up so high and won't be a danger try and take the grills off and see if that helps.
David
Hmmm, with all those wires coming out of the motor, that looks like what I have. Mine has 4 speeds. so you can really dial it in, but low is all I really need.
BTW did you use rock wool behind that sheet rock, it's a real good fire block, also insulates real well.. sound deadner, And not expensive..