quiet please

Some people have suggested that we get Alex used to noises; dog barking, doors closing, doors knocking. But after you've spent four hours trying to put her to sleep you don't want to chance her waking up under any circumstances.
We have had several visitors, some from out of town. They're noisy. They practically slam doors and cupboards shut, drop things and talk loudly. All of the above startle Alex when she's sleeping. When people show up unexpectedly and the dog barks is another annoyance.
People just don't understand, especially those who are not parents. Shhhh.