That's a deliberate design feature of most modern bathroom extractor fans.
The time can usually be varied on the units but most installers seem to not bother and leave it at the default, probably because they don't have to listen to it.
Anyway, I stayed in the Premier Inn in Charing Cross (Glasgow) last week as the Travelodge was not cheap enough at the time
Perfectly serviceable accommodation, handy for the station of the same name. Plenty of free sockets in the room so I could charge all my devices at once. And the usual free wifi.
Only 3 downsides
i) the main lights were too dim. Seems to be getting more common in hotels these days.
ii) only 4 free mini pots of milk for the 2 people I'd booked for (not really even enough for 1 person). And they didn't replenish the tea/coffee for the second night. OK, you can get more from reception but it's a bit of a trek from the 4th floor.
iii) the size of the bed. For some reason, it was really wide (bonus) but the length was shorter than normal so my feet stuck out of the end (I'm about 6ft tall so don't usually have this problem). Fortunately (or unfortunately), I was alone so could sleep diagonally but I'm not sure why the bed was this size. Maybe it was because I was in a corner triangular room and they had to have some custom sized bed or maybe the padded headboards are too deep. And what's with tucking the duvets in at the end? Defeats the point of having a duvet really.
I should add that the nearby
Hengler's Circus Wetherspoons is quite handy for breakfast or a late dinner. Whilst The State Bar over the road from 'Spoons has some excellent cask ales.