Articulation disorder: an articulation disorder is when a person’s speech contains one or more of the following: sound errors, omissions, distortions, or substitutions. These types of production errors affect the quality or intelligibility of the speaker’s speech. In some cases, it is difficult to understand what the person is saying. Fluency disorder: also known as “stuttering,” is distinguished by repetitions of sounds, syllables, or entire words; prolongations of sounds; or blocks of airflow or voicing during Speech Therapy Language Pathologist clinical fellowship are examples of primary behaviors. Resonance disorder: also known as “voice disorders”. Voice disorders occur when the speech signal produces too much or too little nasal and/or oral sound energy. It may be caused by physiological or functional (e.g., neurogenic) factors, and it may also be caused by mislearning (e.g., articulation errors that can lead to the perception of a resonance disorder).