Question about Trisa Fresh Breeze

From my point of view, the fan is too loud to sleep.

You could install a db Mess app on your mobile phone and use it to measure the volume ;-)

On the highest setting, it is a bit loud for the bedroom. Nevertheless, I find it quieter than other fans (e.g. Stadler Peter).
We still use it in the bedroom on a lower setting.

Since I don't have a decibel meter, I can't say anything about it. The volume varies depending on the setting.
The fan is suitable for every room; I have just used it in the kitchen to blow smoke out of the window. Most of the time I use it in the bedroom, it is quiet enough for me. No filter