Yes; masking signals (noise), delay circuitry, feedback (noise cancellation), bespoke waveforms - no doubt there are many approaches.
But I would say that stammering can also be triggered by different events for different people (or even on different occasions for the same person); tiredness, stress, emotional state, and what-have-you.
I believe it's a bit like TENS - "if it works for you" (
ie, the patient) then great.
Otherwise ... ?
Meanwhile, here are a couple more Garden Paths for the Researchers to have a go at ... does stammering occur when:-
1) Singing?
2) Speaking in a foreign *language?
*
Meaning one that has been learned since childhood.
