> "The Oxford researchers proposed that the large spontaneous waves of brain activity that occur during deep sleep, or non-rapid eye movement sleep (non-REM), m

> "The Oxford researchers proposed that the large spontaneous waves of brain activity that occur during deep sleep, or non-rapid eye movement sleep (non-REM), might suppress the brain activity that leads to tinnitus.2 I have a permanent tinnitus and my watch tells that I have a low level of deep sleep. I wonder how I could improve my deep sleep? (I am retired, live on countryside and have some physical activity)