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A voice disorder occurs when an individual expresses concern about having an abnormal voice (with reference to voice quality, pitch or loudness) that does not meet daily needs-even if others do not perceive it as different or deviant. 1,2 Voice disorders are a source of increasing concern, as normal voice quality is a social demand for at least one-third of the population in developed countries. 3 Estimates are considerably higher for at-risk people, such as teachers and professional singers. 4 In addition, the increasing exposure to certain pathogenic factors and development of related diseases aggravate voice disorders. These include smoking, alcohol abuse, air pollution, acoustic contamination, ageing and problems such as gastroesophageal reflux and allergy. Traditional methods of detecting pathology rely on perceptive evaluation methods (Grade, Roughness, Breathiness, Asthenia, Strain-GRBAS scale), 5 acoustic analysis and visual inspection (indirect laryngoscopy and videolaryngostroboscopy). On the other hand, the stiffness of the vocal fold

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