Maybe
This youtube video can help you further.
Slow paced music without talking/speaking is usefull.
here are some of music, from the youtube
VERY POWERFUL BRAIN HEALING SOUNDS
Silva Method- Alpha sound < use this and positive visualisations.
And even this
or this
The volume should be set as low as possible, but still kinda hearable. (around 5% to 10%) listened with headphones (if you aren't troubled by them)
Another useful thing is, before going to sleep, not to listen Radio or watch tv/movies for 30mins~1 hour.
Spend it in quiet, sitting on the bed, or look out of the window, moving your eyes very slowly from thing to thing, Looking at them without thinking.