Introduction: Spasmodic dysphonia (SD) is a problem that affects speech and vocalization. one of the most devastating disorders of oral communication. It is characterized by vocal quality tensaestrangulada. harshly and / or interspersed with abrupt vocal attack and a great tension in the vocal tract. https://thebookmarkid.com/story19599491/uluslararasi-kr%C4%B0zlerde-kr%C4%B0z-%C4%B0let%C4%B0%C5%9E%C4%B0m%C4%B0-ve-uygulamasi