See article below. Tuning fork therapy has been in use since 1878.
Thanks for sharing - I moved into frequency medicine when I decided to move away from allopathy. It totally works! Nice to have some data to support the observations! 
Great article and not one that I’ve seen. We have been utilizing vibration therapy with various applications for over 10 years but wish I had known the powerful healing potential earlier on in my career. I can attest, first hand, to some of the dramatic health claims made in this research narrative and I’ll be on the lookout for other exciting mentions I wasn’t aware of. Manual/mechanical/natural and nutritional therapies…a wise pursuit of a healthy life.
A similar uncertainty. I rubbed DMSO on my decolletage, forgetting about my pacemaker. I had unusual chest pain for the rest of the day. I have never repeated the application and have never felt the pain again.
I grew up with DMSO, so am careful about contamination. I order it from Dr. Jacob’s son so I trust the source. I was surprised and a little confused.