Objective: The effects of voice disorders vary from person to person. Occupation, work environment, life, and family reaction are variables that affect one’s perception of his/her own as an impaired voice. Voice Handicap Index (VHI) has not yet been used to compare the degree of voice disorders. Assuming that the quality of life may be different under a variety of voice disorders and that diffe...

Background and Purpose: Lipoid Proteinosis (LP) is a rare hereditary progressive disorder caused by a disorder of collagen metabolism. In LP, hyaline deposits in mucous membrane of true vocal folds causes hoarseness. The studies on the laryngeal and voice features of patients with LP are rare. To the best of our knowledge, this is the first research to study acoustic and perceptual voice feat...

Background: Hypothyroidism may cause symptoms and disorders in different parts of the body which can lead to speech disorders. This research was done to recognize and identify speech disorders in patients with Hypothyroidism. Materials and methods: This descriptive study was done on 120 subjects with hypothyroidism, with T4 4mU/L. Members of the study team interviewed all subjects, performed a...

Objectives: “Voice” is affected more and sooner than other speech subsystems in Parkinson's Disease (PD). Voice Handicap Index (VHI) is the most applicable subjective self-rating questionnaire in VD patients. The aim of this study was the investigation of Voice handicap in Iranian PD patients. Methods & Materials: This cross-sectional, analytical and non-interventional study was ...

Objective Today transoral laser microsurgery is considered as one of the first options to control early laryngeal cancer, and voice disorder is one of the inevitable complications of this therapeutic component. This study aimed to compare the vocal function in patients with early-stage laryngeal cancer following laser surgery with healthy individuals with normal voice quality using acoustic ana...