The playlist is Tinnitus Retraining Therapy by Tinnitus Institute on Spotify. The specific track that masks my usually unmaskable high pitched ringing is Wind Chimes.

Aftershockz are about $80 on Amazon for the regular ones. They have high end ones for more but I am happy with the regular ones for making purposes.

AfterShokz Titanium Open Ear Wireless Bone Conduction Headphones, Ocean Blue, AS600OB https://smile.amazon.com/dp/B018XNGO5A/ref=cm_sw_r_cp_apa_i_x-7rEb1BP8W65