List of voice disorders: Voice disordersTitze, I.R.Voice changer: The term voice changer (also known as voice enhancer) refers to a system of altering a person's voice to either make them sound like someone else or to disguise their voice.Spasmodic dysphonia: Spasmodic dysphonia (or laryngeal dystonia) is a voice disorder characterized by involuntary movements or spasms of one or more muscles of the larynx (vocal folds or voice box) during speech.Belting (music): Belting (or vocal belting) is a specific technique of singing by which a singer brings their chest register above its natural passaggio (break) at a loud volume; instead, an alternative production is developed, often described and felt as supported and sustained yelling. 'Belting' is sometimes described as 'high chest voice' but this is technically incorrect and potentially damaging for the voice.JohreiJanwillem van den Berg: Janwillem van den Berg (20 November 1920 in Akkrum – 18 October 1985 in Akkrum) was a Dutch speech scientist and medical physicist who played a major role in establishing the myoelastic-aerodynamic theoryTitze, I. R.Vocal folds: The vocal folds, also known commonly as vocal cords or voice reeds, are composed of twin infoldings of mucous membrane stretched horizontally, from back to front, across the larynx. They vibrate, modulating the flow of air being expelled from the lungs during phonation.Mallampati scoreDysprosody: Dysprosody, which may manifest as pseudo-foreign accent syndrome, refers to a disorder in which one or more of the prosodic functions are either compromised or eliminated completely.Rima glottidis: The rima glottidis is the opening between the true vocal cords and the arytenoid cartilages.Motor speech disorders: Motor speech disorders are a class of speech disorder that disturb the body's natural ability to speak. These disturbances vary in their etiology based on the integrity and integration of cognitive, neuromuscular, and musculoskeletal activities.KamaladalamPosterior cricoarytenoid muscle: The posterior cricoarytenoid muscles are extremely small, paired muscles that extend from the posterior cricoid cartilage to the arytenoid cartilages in the larynx.Front vowel: A front vowel is any in a class of vowel sound used in some spoken languages. The defining characteristic of a front vowel is that the tongue is positioned as far in front as possible in the mouth without creating a constriction that would make it a consonant.Mucus: In vertebrates, mucus ( ; adjectival form: "mucous") is a slippery secretion produced by, and covering, mucous membranes. Mucous fluid is typically produced from cells found in mucous glands.John C. Snidecor: John Clifton Snidecor (October 18, 1907 - December 14, 1983) was an American professor and educator. He joined the faculty at Santa Barbara College of the University of California (now UCSB) in 1940 and served as acting provost of from February to June 1956.Bipolar disorderMental disorderDragonDictate: DragonDictate, Dragon Dictate, or Dragon for Mac, is proprietary speech recognition software. The older program, DragonDictate, was originally developed by Dragon Systems for Microsoft Windows.Social anxiety disorder