Delayed Auditory Feedback for speech disorders

Stuttering is fluid impairment in verbal speech which will be determined based on the involuntary repetitions and prolongations, either vowel or voiceless. A variety of methods is available to aid patients who suffer from stuttering. One of the treatment methods is using the DAF (Delayed Auditory Feedback) device, the patient hear his/her voice after few delays. DAF (Delayed Auditory Feedback) trains patients to speak fluently by playing back the patient´s voice after some delays. DAF plays the person´s own voice back to them, and they hear it with a slight delay, usually about one tenth of a second later. The aim of the paper is to design DAF in order to cure stuttering and relief patients from stresses that caused by stuttering. In this article, we have used AVR ATmega128 to design DAF in this aim. Microphone is also used to take the analog samples and A/D converter is used to convert analog to digital signals. Finally, the small “anti-stuttering” device that uses hearing aid technology to deliver Delayed Auditory Feedback (DAF) will be designed.