The air conditioning unit makes a deafening noise.
as-sor-DAN-te — four syllables, stress on the third.
When the A/C unit is so loud it prevents sleep. This is especially common with older split-unit systems.
'Assordante' (deafening) is a strong adjective from 'assordare' (to deafen). 'Fa un rumore assordante' = it makes a deafening noise. 'Condizionatore' is the more technical term for air conditioning unit; 'aria condizionata' refers to the concept of air conditioning.
L'aria condizionata fa un rumore strano.
The air conditioning makes a strange noise.
A strange noise may indicate a mechanical problem beyond just noise pollution
Il condizionatore vibra.
The air conditioning unit vibrates.
Vibration in A/C units is often from a loose fan blade or filter
Posso spegnere il condizionatore e avere un ventilatore?
Can I turn off the air conditioning and have a fan instead?
A practical solution request
Italian hotel A/C units, particularly older split-type units, can rattle, vibrate, and drip. The older the hotel and the cheaper the category, the more likely this is. When choosing a room, look for 'climatizzatore silenzioso' (quiet air conditioning) in the room description.