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KMID : 1036820190240030770
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Communication Sciences & Disorders
2019 Volume.24 No. 3 p.770 ~ p.784
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Development and Validation of a Novel Simplified Voice Range Profile Measurement Method: Comparison of Maximum Vocal Performance Based on the VRP Protocol
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Jung Won-Jung
Choi Seong-Hee
Choi Chul-Hee
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Abstract
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Objectives: Voice Range Profile (VRP) has been widely used as an objective voice assessment method in the clinical practice to evaluate vocal function. The objective of this study was to compare the maximum vocal performance among the current VRP measurement protocols and to develop a novel short-form of VRP measurement method based on its validation.
Methods: Forty young adults (20 males, 20 females) participated for VRP measures and 20% participants (4 males, 4 females) were randomly selected for testing a novel simplified VRP protocol. Minimum F0, maximum F0, frequency range, minimum & maximum intensity, and intensity range were measured and compared among the different VRP protocols using the VRP program.
Results: Among the different vowel types to elicit the maximal VRP performance measures, the largest voice range was observed in vowel /a/. In terms of repetition measurements, it was the largest when it was carried out five times. In addition, among different procedures to elicit, the semitone scale demonstrated significantly wider range than glissando (p<.05). Moreover, a novel simplified VRP protocol represents a significantly wider frequency range than that of the other VRP protocols (p<.05). On the other hand, the intensity range was the largest in semitone (p<.001), but there was no significant difference between the semitone and novel simplified VRP.
Conclusion: A newly developed VRP measurement method was feasible and effective to obtain a reliable vocal range. This simplified protocol should be adapted for trained professional voice users and future research should expand to test its validity for the dysphonia population.
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KEYWORD
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VRP, Vowel type, Measurement method, Validity, Normal voice
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