The singing voice is a sensory-motor phenomenon that requires a balance of various physical abilities to function flawlessly. In the thesis, the organs' anatomical structures involved in singing and their physiological functioning were examined from an acoustic standpoint. In terms of musical acoustics, the singing voice is an instrument consisting of the lungs, chest and associated musculature as a supplier of oscillation energy, the vocal folds as an oscillator, and the larynx, pharynx, oral and nasal cavities in function of a resonating body. In Laryngology, the branch of medicine researching this field, various methods are used for investigating the structure and function of the vocal apparatus and to detect possible pathological processes. For a functional examination of the organ, videolaryngoscopy with stroboscopy is the most used in general practice. Whereas for a quantitative assessment of the vocal quality often a spectral analysis of the speaking and singing voice is performed. In the empirical part, we performed a descriptive qualitative comparative study on three subjects (coloratura soprano, lyric soprano and lyric mezzo-soprano). We performed videolaryngoscopy with stroboscopy, examination of the oral cavity and pharynx and acoustic analysis of the speaking and singing voice using the Computerized Speech Lab (CSL), model 4150B and the Multi-Dimensional Voice Program (KayPentax, USA).
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