Niebudek-Bogusz Ewa, Sliwińska-Kowalska Mariola
Klinika Audiologii i Foniatrii, Instytut Medycyny Pracy im. prof. J. Nofera, Lódź.
Med Pr. 2006;57(6):497-506.
An assessment of the vocal system, as a part of the medical certification of occupational diseases, should be objective and reliable. Therefore, interest in the method of acoustic voice analysis enabling objective assessment of voice parameters is still growing. The aim of the present study was to evaluate the applicability of acoustic analysis with vocal loading test to the diagnostics of occupational voice disorders.
The results of acoustic voice analysis were compared using IRIS software for phoniatrics, before and after a 30-min vocal loading test in 35 female teachers with diagnosed occupational voice disorders (group I) and in 31 female teachers with functional dysphonia (group II).
In group I, vocal effort produced significant abnormalities in voice acoustic parameters, compared to group II. These included significantly increased mean fundamental frequency (Fo) value (by 11 Hz) and worsened jitter, shimmer and NHR parameters. Also, the percentage of subjects showing abnormalities in voice acoustic analysis was higher in this group.
Conducting voice acoustic analysis before and after the vocal loading test makes it possible to objectively confirm irreversible voice impairments in persons with work-related pathologies of the larynx, which is essential for medical certification of occupational voice diseases.
作为职业病医学鉴定的一部分，对发声系统的评估应客观可靠。因此，对能够客观评估嗓音参数的声学嗓音分析方法的兴趣仍在不断增加。本研究的目的是评估声学分析结合发声负荷试验在职业性嗓音障碍诊断中的适用性。
使用用于语音治疗学的IRIS软件，对35名被诊断为职业性嗓音障碍的女教师（第一组）和31名功能性发声障碍的女教师（第二组）在30分钟发声负荷试验前后的声学嗓音分析结果进行比较。
与第二组相比，第一组发声用力导致嗓音声学参数出现显著异常。这些异常包括平均基频（Fo）值显著增加（增加11赫兹）以及抖动、闪烁和噪声谐波比（NHR）参数恶化。此外，该组中嗓音声学分析显示异常的受试者百分比更高。
在发声负荷试验前后进行嗓音声学分析，能够客观地确认患有与工作相关的喉部病变者存在不可逆的嗓音损伤，这对于职业性嗓音疾病的医学鉴定至关重要。
