Aerodynamic measures capture the client’s ability to manage airflow with vocal fold phonation. Perceptual measures provide auditory-perceptual ratings of the client’s voice and the impact the voice problem has on the client’s quality of life. These recording are then analyzed by voice analysis software. 4 Clients are asked to record sustained phonation and speech tasks. 6 Acoustic measures determine vocal amplitude, frequency, and quality of the voice signal. 4– 7 Acoustic, perceptual, and aerodynamic measures are components of a comprehensive voice assessment. 3, 6 SLPs assess clients by collecting a clinical history, acoustic, perceptual (including client reported outcome measures), and aerodynamic measures to determine the function of the vocal mechanism, limitations caused by the impairment, impact of the impairment on quality of life, and stimulability for voice therapy. 5, 6 Otolaryngologists assess clients by collecting a case history, performing a physical examination, and visualizing the larynx using laryngoscopy to determine a diagnosis and the best course of treatment. ![]() 4 Individuals who are suspected of having a voice disorder are assessed by a multidisciplinary team that includes an otolaryngologist and a speech-language pathologist (SLP). 2 A voice disorder is defined as “altered voice quality, pitch, loudness, or vocal effort that impairs communication … and/or affects quality of life.” 3,p.3 The etiology of a voice disorder can be organic (i.e., a structural or neurological change that affects the respiratory, laryngeal, or vocal tract mechanisms) or functional (i.e., extensive or improper use of the vocal mechanism). According to the 2012 National Health Interview Survey, voice disorders are the most reported communication impairment 1 with an estimated 1 in 13 adults in the United States having a voice disorder annually.
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