New fridge works fine but it apparently has a variable speed compressor that runs slowly but almost continually. The noise is unnoticeable *except* when I'm trying to sleep at night. After six months I cannot get used to it.
Worst part is I am deaf at the high frequency end but apparently better than average at the low frequencies as my wife cannot hear it.
Unless someone here can think of a solution I'm going to just give this thing away and try to find one with the single speed compressor that will run for 15 minutes then stay quiet for four hours.