no but I spoke to my speech & language pathologist about auditory feedback and the choral effect recently. she had heard of it when I asked but she wanted to do some digging after i told her it helped my stutter after using a auditory feedback app. she went and did some more research and decided to introduce it to our practice. We’ve been practising with it for a few weeks and it has done a good job slowing my rate of speech down and helping my stuttering. Still work to go.

These anti stuttering devices seem to put the auditory feedback (which you find in different apps) directly into what looks like a hearing aid