Saltwater Heat Pumps - Noise Levels

Hello everyone! I am a bit torn. I am currently researching ground-source heat pumps, can you tell me how reliable the manufacturers' information is regarding noise pollution? For example, many providers claim to have especially quiet operation. Are there specific requirements for when a heat pump can be called particularly quiet, or is that left to the marketing department? I haven't seen any decibel information anywhere yet, is there a way to estimate in advance how loud the pump will be? Are newer heat pumps also quieter, or is this not a focus in development? Thank you very much and best regards

I have a Geo*thing from V... The noise level and the noise itself is the same as that of a refrigerator (it's nothing else anyway). In the technical room/cellar with door, not audible elsewhere

Thank you, if you have never experienced something like this in real life, it is somehow hard to assess. But it is quite amazing how normal refrigerator noises are for us – with heat pumps, on the other hand, I have often been made aware of the apparent noise disturbance. What the monkey doesn't know... ;)