Cleaning the air is good. PC fan boxes are a quieter option too: https://itsairborne.com/pc-fan-corsi-rosenthal-guide-a611dabf7e0c https://itsairborne.com/pc-f

Cleaning the air is good. PC fan boxes are a quieter option too: https://itsairborne.com/pc-fan-corsi-rosenthal-guide-a611dabf7e0c https://itsairborne.com/pc-fan-corsi-rosenthal-guide-a611dab... (Incidentally, PC fans can also be used to pull/push air through N95/FFP2 masks.)