The most practical way to make the outdoor air conditioner upstairs too noisy.

The outdoor air conditioner upstairs is too noisy. Try to communicate first to remind them of the noise problem when using air conditioning. If communication fails, use sound insulation materials to reduce noise, such as placing sound insulation boards or sound insulation foam, or using sound insulation curtains. If the above measures have no effect, complain to the property or relevant departments, and they may take measures to solve the problem, such as requiring the replacement of air-conditioning equipment with less noise or adjusting the position of air-conditioning units. Patience and communication are the keys to solve this problem.