A device for treating and reducing stuttering by utilizing auditory feedback. A bone conducting hearing aid apparatus is arranged to be attached to the skull bone of a user with a stuttering problem so that his ear canal is left free. A tactile component in the form of a vibrator mechanically transmits sound information to the inner ears of the user via the skull bone so that both cochleas are stimulated. The cochlea on the opposite side of the skull receives a signal that is further delayed and also has another frequency characteristics compared to the digital received by the nearest cochlea.