You can't so much as be loud in any way if you don't want them waking up or being able to get to sleep. And, with my chronic insomnia, that's a real bad mix.
I consider myself a light sleeper, but even if I wasn't light and just... 'normal', I think any form of Loud would wake someone/me up.
To be honest though, I sleep through my alarm a lot...... So I don't know, maybe I'm just woken up by 'unknown' sounds.
I'm a light sleeper, but I also tend to go right back to sleep once I know that it wasn't anything dangerous.