Comparison of Two Perceptual Methods for the Evaluation of Vowel Perturbation Produced by Jitter
| Autor: | Jorge A. Gurlekian, Humberto Maximiliano Torres, Maria Elena Vaccari |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Adult
Male Speech-Language Pathology Time Factors CIENCIAS MÉDICAS Y DE LA SALUD Computer science Voice Quality Speech recognition media_common.quotation_subject Ciencias de la Salud Speech Acoustics 030507 speech-language pathology & audiology 03 medical and health sciences Speech and Hearing Judgment 0302 clinical medicine Phonation Speech Production Measurement Predictive Value of Tests Vowel Perception Humans Matching 030223 otorhinolaryngology media_common Jitter Aged Observer Variation Salud Ocupacional Voice evaluation Reproducibility of Results Middle Aged LPN and LVN Otorhinolaryngology Acoustic Stimulation Speech Perception Female 0305 other medical science Magnitude estimation |
| Popis: | Objectives: To explore perceptual evaluation of jitter produced by fundamental frequency (F0) variation in a sustained vowel /a/, using two different methods. One is based on listener's internal references and the other is based on external references provided by the experimenter. Methods:We used two methods: one is magnitude estimation-converging limits (ME-CL), which is close to the standard approach used by speech therapists when they use numerical estimations and their own standards, and other is intramodal matching procedure (IMP), where each matched stimulus is to be compared with a fixed-set matching stimuli. Systematic variations were introduced in vowel /a/ by Linear Prediction Coding synthesis using an F0 contour function obtained from a statistical jitter model. Six jitter values were used for each of two reference F0 values. Three groups of listeners were tested: expert speech therapists, speech therapy students, and naïve listeners. Results: Perceptual functions appear to be similar and linear for both methods as the theory predicts. The answers of all groups of listeners tested with ME-CL present higher standard deviations than for IMP. When subjects were tested with IMP, intrareliability and interreliability measurements show a significant improvement for both expert and naïve listeners. Conclusions: Both intraindividual and interindividual differences for expert speech therapists could be better managed when tested with an IMP than when they use numerical estimations and internal standards to evaluate vowel perturbation produced by jitter. This procedure could be the basis for the development of a clinical evaluation tool. Fil: Gurlekian, Jorge Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Inmunología, Genética y Metabolismo. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Inmunología, Genética y Metabolismo; Argentina Fil: Torres, Humberto Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Inmunología, Genética y Metabolismo. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Inmunología, Genética y Metabolismo; Argentina Fil: Vaccari, Maria Elena. Universidad de Buenos Aires. Facultad de Medicina; Argentina |
| Databáze: | OpenAIRE |
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