My little boys the same scared of the noise of the hoover loud music other kids screaming fireworks but loves motorbikes and loud cars 🤦🏻♀️
It may depend on if theres any other concerns alongside. My son hates being around people when they are loud and will cry until removed. Doesn't like the hoover or hand dryers. He wore ear defenders at the fireworks so I don't know for sure if he wouldnt like the noise with that. For some it may be normal but others can be a sign of autism like with my 16 month old. If you feel concerned you could speak to your gp or HV x
My 4yo son is the same way, hates fire alarms and when he was a baby it was the vacuum. Pretty normal imo
Completely normal. My son was like it from a couple of months old. He's now nearly 2 and okay with most noises now x