Fact check this with The Guardian, we will post more links as sources become available and interest in this campaign grows.
https://www.theguardian.com/society/2019/oct/22/radical-light-and-sound-wave-therapy-could-slow-alzheimers?fbclid=IwAR0qZKP6JCWYwCpvX8IFjo-QftsniQWqkxXog2H_s-ceFHK3kGgk3kMc5yA
The tone generator, please read into the use cases.:
https://www.szynalski.com/tone-generator/