What's the best way to stop your partner from snoring like a bellowing elephant with indigestion ?

The ex and I used to run the air conditioner, or the fan all night every night, for the white noise. I wore ear plugs in addition to the white noise, but there were some nights when I had to go out and sleep on the sofa. His sleep apnea machine was even worse. No sudden massive snorts, but the hiss and wheeze of the machine was disturbing. I could hear it through the ear plugs.