Abstract
IntroductionVocal loading capacity is an important aspect of vocal health and is measured using standardized vocal loading tests. However, it remains unclear how vocal fold oscillation patterns are influenced by a standardized vocal loading task.Methods21 (10 male, 11 female) vocally healthy subjects were analyzed concerning the dysphonia severity index (DSI) and high speed videolaryngoscopy (HSV) on the vowel /i/ at a comfortable pitch and loudness before and after a standardized vocal loading test (10 min standardized text reading, at a level higher than 80 dB (A) measured at 30 cm from the mouth).ResultsChanges in DSI were statistically significant, diminishing by 1.2 points after the vocal loading test, which was mainly caused by an increase of the minimum intensity. However, the pre-post comparison of HSV derived measures failed to show any statistically significant changes.ConclusionIt seems necessary to analyze the effects of a standardized vocal loading test on vocal fold oscillation patterns with respect to softest phonation and phonation threshold pressure rather than comfortable pitch and loudness.Level of evidence2c
Highlights
Vocal loading capacity is an important aspect of vocal health and is measured using standardized vocal loading tests
Vocal loading capacity is an important aspect of vocal health and a reduction in such capacity might be a sign of dysphonia
The results of the vocal loading test for sound pressure level (SPL) and ƒo for each minute of the test are shown in Fig. 1 and 2
Summary
Vocal loading capacity is an important aspect of vocal health and is measured using standardized vocal loading tests. For voice professionals, such as teachers, Studies using accelerometers have been used to estimate the vocal dose representative of realistic daily voicing activity [2,3,4,5,6,7,8,9] In this context, it was shown that the dose during professional voice use differs from normal voice use outside working hours [8]. It was shown that the level of vocal dose might vary greatly inter-individually Such measurements using accelerometers do not necessarily show the extent to which the vocal dose is related to vocal problems or signs of vocal fatigue
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