Search for: [Abstract = "Objectives\: Presented work aimed to study the relationship between the length of vocal folds and classical voice type among professional opera singers. Also, the paper attempts to assess if individual features such as height and body mass index are associated with the vocal folds length \(VFL\) and the vocal range. Research compared VFL and voice type by evaluation of neck computed tomography imaging of professional opera singers obtained between 2009 and 2015. Vocal range was measured after scanning procedure by a speech\-language pathologist. The results were used to compare VFL with vocal range, voice type, and individual features of every singer. Objectives of another part of study were to assess the most significant morphological changes and acoustic measures for the ageing process of a professional opera singer’s voice. Lastly, the research aimed to estimate the prevalence and characteristic symptoms of vocal fatigue in professional opera singers. Material and methods. In first part of study\: the group included 93 opera singers \(female\: 31 sopranos, 15 mezzos, and 5 contraltos\; male\: 17 tenors, 16 baritones, 6 basses, and 3 countertenors\). Different values such as VFL, vocal range, and individual features \(height, weight, body mass index\) were analysed statistically. In second part investigation included 58 healthy professional opera singers, who were compared with 42 young"]

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