I think you're just going to have to put her in another room while you do what you need to do. You can't protect her from all the loud noises in life, so you might as well get her used to them in a safe environment. If you minimize them for her sake, she may even think that she's right, and that all those loud noises are "bad" because mama tries so hard not to make them, and that's just going to aggravate the problem.