hearing and should not be perceived as disturbing even in the immediate vicinity. During the night you can experiment with the different settings of the fan to find a level that does not prevent you from falling asleep. Additional customer reviews can be found via this link! * Why do I need this mini air cooler? The glacier portable ac does not have a fixed target group. The Mini Air Cooler is suitable for any user who wants to cool down quickly at high temperatures. The purchase is practical for example for tenants who live in an apartment without air conditioning. Especially in attic flats with insufficient