This pain relief meditation track uses delta and sub-delta wave isochronic tones which have been theorized to have soothing effects on the limbic system, the amygdala and hypothalamus in particular, which themselves operate at delta frequencies.
Delta frequencies can be so helpful with conditions involving chronic pain, such as fibromyalgia. The frequencies used fall between the range of 0.50Hz to 2.5Hz and have been associated with providing relief for back and muscle pains.
Headphones/earbuds are not required for this particular isochronic tones session.
Adjust the volume to a level you feel comfortable with.