@Yellowblue44 I never used ear sound generators. I have hearing aids due to a complex hearing loss (often referred to as a "cookie bite" loss). But I did use sound therapy on these, usually pink noise, for about 4 hrs every day. Once I did rebuild the tolerance for this again. I did this gradual over probably 6 months or so, starting with it 6-12 months after my worsening back in 2019.