title: Auditory-Perceptual and Acoustic Methods in Measuring Dysphonia Severity of Korean Speech.
abstract: OBJECTIVE
  The purpose of this study was to explore the criterion-related concurrent validity of two standardized auditory-perceptual rating protocols and the Acoustic Voice Quality Index (AVQI) for measuring dysphonia severity in Korean speech.
  
  
  METHODS
  Sixty native Korean subjects with various voice disorders were asked to sustain the vowel [a:] and to read aloud the Korean text "Walk." A 3-second midvowel portion of the sustained vowel and two sentences (with 25 syllables) were edited, concatenated, and analyzed according to methods described elsewhere. From 56 participants, both continuous speech and sustained vowel recordings had sufficiently high signal-to-noise ratios (35.5 dB and 37 dB on average, respectively) and were therefore subjected to further dysphonia severity analysis with (1) "G" or Grade from the GRBAS protocol, (2) "OS" or Overall Severity from the Consensus Auditory-Perceptual Evaluation of Voice protocol, and (3) AVQI.
  
  
  RESULTS
  First, high correlations were found between G and OS (rS = 0.955 for sustained vowels; rS = 0.965 for continuous speech). Second, the AVQI showed a strong correlation with G (rS = 0.911) as well as OS (rP = 0.924). These findings are in agreement with similar studies dealing with continuous speech in other languages.
  
  
  CONCLUSIONS
  The present study highlights the criterion-related concurrent validity of these methods in Korean speech. Furthermore, it supports the cross-linguistic robustness of the AVQI as a valid and objective marker of overall dysphonia severity.
authors: Sint-Augustinus General Hospital, European Institute for Otorhinolaryngology-Head & Neck Surgery, Antwerp, Belgium; Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium. Electronic address: youri.maryn@gza.be.
authors: Youri
authors: Y
authors: Maryn
authors: Yeson Voice Center, Seoul, Korea.
authors: Hyung-Tae
authors: HT
authors: Kim
authors: Speech Pathology Education, Graduate School of Education, Kangnam University, Yongin-si, Korea.
authors: Jaeock
authors: J
authors: Kim
mesh_terms: D000162:Acoustics; D000293:Adolescent; D000328:Adult; D000368:Aged; D055154:Dysphonia / Q000175:diagnosis* / Q000503:physiopathology / Q000523:psychology; D005260:Female; D006801:Humans; D007600:Judgment; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D010700:Phonetics; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D056910:Republic of Korea; D012720:Severity of Illness Index; D013061:Speech Acoustics; D013067:Speech Perception; D013068:Speech Production Measurement / Q000379:methods*; D013997:Time Factors; D014833:Voice Quality; D055815:Young Adult
keywords: Acoustic Voice Quality Index; Auditory-perceptual ratings; Correlation; Korean speech; Overall dysphonia severity