My seven month old DD has in the past two weeks developed a sensativity to some weird noises and I’m wondering if this is normal. It’s not loud noises that are the problem as an ambulance can drive past full siren and she doesn’t bat an eyelid. But things like the hoover, the hand blender, a hand dryer and pulling off a piece of sellotape will have her hysterically crying within seconds. She sleeps with white noise on all night long and is perfectly happy with it and used to love noises like the hoover to go to sleep. Is this normal behaviour? And if so, is there anything I can do about it?