I’m no expert, but I am familiar with the concept of “tuning” the immune system to recognize cancerous cells via pharmaceuticals. Some of these treatments may cause the immune system to attack healthy tissue. I don’t know if this is still the case.
I think the difference here is that the sound treatment causes the initial disruption to the cells, and then the immune system realizes (on its own) that the cells are a threat. Then, the immune system can start attacking the bad cells.