Immediate speech fluency improvement after application of the Digital Speech Aid in stuttering patients

Background The Digital Speech Aid (DSA) is a pocket-sized device used for speech correction in stutterers. The device modifies the patient’s auditory feedback with the use of Delayed Auditory Feedback (DAF) and Frequency-shifted Auditory Feedback (FAF). Both methods are well-known to improve speech fluency in stuttering persons. The aim of this study was to assess immediate disfluency reduction after application of the DSA.