Search for: [Abstract = "levels in comparison to that in younger singers. Older singers were found not to have substantially different values of jitter than younger ones. Maximal phonation time \(MPT\) was longer in the older women group when compared to younger singers, but not relatively different in the men group. Shimmer value presented no age related change. Morphological changes seem to correlate with the age of subjects. The last part of the study was to assess the prevalence of vocal fatigue in 10 years period for singers’ group and was 22%. The three most frequent symptoms observed in the study group were\: muscle pain \(87.27%\), muscle fatigue \(76.36%\) and diffuse sharp pain in the neck \(70.37%\). Statistical analysis showed significance only for the relationship between female opera singers and incidence of symptoms such as tremulous voice and muscle pain. All other symptoms were not statistically related to gender. Contradictory to expectations, application of anti\-inflammatory drugs was statistically associated with the longer duration of the symptoms. Conclusion. Presented data support the hypothesis that there are significant differences of VFL, vocal range, and body morphology between professional singers of different voice classification. The main characteristic of voice change over age was a decreased F0 level among older female professional singers and rather stable F0 levels in male s"]

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