Is there such a thing as a window air conditioner that does not make an annoying low-frequency throbbing while the compressor is running?
I do understand how this works, we have a high-power 60 Hz motor running a high-pressure pump, and you can hear the 60 Hz line frequency as everything inside the pump vibrates in sync with it.
I understand electronics and I know that we could have compressor motors that don't run on 60 Hz AC.
We could have a DC-motor compressor with an electronic AC to DC voltage converter.
We could have a three or more phase compressor motor driven by an equally tiny variable speed drive (also known as variable frequency drive), with a carrier frequency of 16kHz or more so it's not audible.
By eliminating the 60 Hz driving frequency we could make the compressor, and the "window shaker" in general, essentially silent except for the noise from the blower, and refrigerant gurgling through the tubing.
But the question is, does such a thing exist? So far my Google searches are not turning up anything.