Our 4 month old screams at the oven timer, and only the oven timer
Pressure cooker whistle, doorbell, the neighbour's drill: nothing. She sleeps through all of it. I bake to stay sane on maternity leave. The oven timer beeps three times and she wakes up screaming like I've betrayed her. Every single time. I now stand next to the oven for the last two minutes so I can switch it off before it goes.