I sleep like that, with earplugs and a white noise generator. The frequencies that make it past the earplugs are the ones you want anyway for blocking other sou

I sleep like that, with earplugs and a white noise generator. The frequencies that make it past the earplugs are the ones you want anyway for blocking other sounds that make it past, so it's not that counterintuitive. The only sounds that now interrupt my sleep are low frequencies coming from below, through the pillow-side ear which doesn't get to hear the sound generator much.