Yes; it's interesting about the "neon". It would be nice to be able to take a closer look.
It would also be good to see what the ouptut signal waveform is like.
Meanwhile ... the patient pushes the button when ready to speak. The "noise" produced by the box of tricks masks the speech
via the headphones he's wearing (so that he doesn't hear himself speaking). He then releases the button to hear the therapist.
The idea being that the stutterer is helped by not hearing the sound of his own voice. Anyway, that's the theory.
And then there is a tendency to SHOUT!
You can't win.
OK, this is "electromedical" equipment (our Bread and Butter) - but I can't help thinking that (like many other "specialist" bits of kit I've come across in my time) it's probably not much good at treating what it's supposed to be treating!
In other words, I've always taken the view that it's generally better to treat the causes of ailments rather than the symptoms.
