I have two alarms right now, but I think I actually sleep through a decent amount of street noise. One time my parents stayed over at my place they woke up in the morning asking me if I heard the car alarms going off in the middle of the night. I hadn’t heard a thing. I think the noise that will definitely wake me up is a fire engine with the sirens and horns blowing. I’ve woken up to that a number of times.