Having an air conditioner that makes a lot of noise can be distracting to say the least.
From not being able to hear the TV to talking on the phone loud appliances such as A/C units can be very annoying.
There are a few things that can be done to help quiet down a loud A/C unit with some tips here.
Read Here for Tips To Quiet a Window Mounted Air Conditioner
Read Here for Tips To Quiet a Standard A/C or Heat Pump Unit.
Often tightening down bolts that are letting the unit rattle about can go a long way in helping the noise level.
Of course build quality matters and having a known good manufacture is always a good idea.
No matter how good a unit is built though shipping and installation can loosen bolts and tweak a unit so it makes more noise.
The compressor is what makes the most noise some fixes being rubber vibration mounts and noise suppressant blankets that enclose the compressor.
Sound suppressant blankets are cheap easy to install and work well and lowering the noise levels of a compressor.
Of course the fan levels also matters with different fan technology available that makes less noise.
Standard fans work with blades while many newer units use cylinders that make less noise.
Read Here For The Quietest Window Mounted A/C Units.
Mini splits are a good option when it comes to making low noise levels since the noisy components such as the compressor can be mounted away from a home.
The only noise levels a mini split makes is from the internal blower which spreads cold or hot air into a home.
Reading review on units is always a good idea on a forum or sites such as Amazon to see if they are a good fit for your home.