Most modern split-system air conditioners are very quiet indoors and out, but it’s worth checking an air conditioner’s noise levels before you buy.
We measure noise as part of our split-system air conditioner reviews. In our latest test, the noise from indoor units ranged from 19dB to 53dB, and from the outdoor units, 42dB to 69dB (measured on the quietest indoor fan setting).
For comparison, here are some common sound levels:
30dBA: typical sound level of a quiet home
50dBA: interior of a quiet car while driving
60dBA: typical conversation
70–80dBA: vacuum cleaner