Tootfinder

This looks like a potential money maker for marketing to #boomers. I am one myself, and #dementia is my number one fear. Just gin up a little gizmo that generates a 40 Hz tone that I can plug into my hearing aids, or generic ear buds. Who cares if it works, you’ll make millions overnight.

Listening to this sound could help reverse Alzheimer’s | BBC Science Focus Magazine
The research is in its early stages but offers “encouraging” evidence of a potential treatment for Alzheimer’s