Read the section under : https://en.wikipedia.org/wiki/Stuttering#Causes https://en.wikipedia.org/wiki/Stuttering#Causes See the piece I quoted regarding 'Audi

Read the section under : https://en.wikipedia.org/wiki/Stuttering#Causes https://en.wikipedia.org/wiki/Stuttering#Causes See the piece I quoted regarding 'Auditory Masking' and 'Delayed Auditory Feedback (DAF)', or 'Frequency Altered Feedback'? Develop a phone-app to use the phones' microphone to have adjustable delay, frequency-equalization and noise injection. Find Bluetooth 'bone conduction headphones' that conducts through the collar-bone, these can be worn under a shirt. Auditory Masking : https://en.wikipedia.org/wiki/Auditory_masking https://en.wikipedia.org/wiki/Auditory_masking Delayed Auditory Feedback (DAF) - Effects in People who Stutter : https://en.wikipedia.org/wiki/Delayed_auditory_feedback#Effects_in_people_who_stutter https://en.wikipedia.org/wiki/Delayed_auditory_feedback#Effe... Note! 'Descriptor Phrases' between Apostrophes are intended to be searched with the Apostrophes included.