Intertext Variability of Smoothed Cepstral Peak Prominence, Methods to Control It, and Its Diagnostic Properties
| Autor: | Masanori Umatani, Makoto Ogawa, Itsuki Kitayama, Mio Iwahashi, Naoki Matsushiro, Chieri Kato, Hidenori Inohara, Toshihiko Iwahashi, Kiyohito Hosokawa, Shinobu Iwaki, Misao Yoshida |
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| Rok vydání: | 2020 |
| Předmět: |
Adult
Male Sound Spectrography Voice Quality Speech recognition Diagnostic accuracy Speech Acoustics 030507 speech-language pathology & audiology 03 medical and health sciences Speech and Hearing 0302 clinical medicine Speech Production Measurement Predictive Value of Tests Vowel Cepstrum Humans 030223 otorhinolaryngology Aged Retrospective Studies Mathematics Sustained vowel Hoarseness Acoustics Middle Aged Dysphonia LPN and LVN Otorhinolaryngology Female 0305 other medical science |
| Zdroj: | Journal of Voice. 34:305-319 |
| ISSN: | 0892-1997 |
| Popis: | Summary Objectives This study aimed to estimate the intertext variability of smoothed cepstral peak prominence (CPPS), examine whether sound-processing techniques improved its variability and diagnostic capability, and evaluate the degree of intertext variability in detail with reference to the CPPS variabilities in sustained vowels. Study design This was a retrospective study. Methods Text readings of 58 Japanese syllables were recorded from 210 speakers with different diagnoses and varying degrees of dysphonia, and were divided into six passages. Applying the sound-processing techniques to those passages, we prepared three sample types: (1) nonprocessed, (2) only-loud, and (3) only-voiced samples. The intertext CPPS variability and diagnostic properties were compared across the passages and sample types. For detailed analysis, we subsequently extracted 63 normophonic speakers who maintained constant quality in their vowel utterances to evaluate the degree of intertext CPPS variability in relation to the variabilities between repeated identical vowels and across different vowels. Results Although several combinations of passages showed moderate-to-large CPPS variabilities, those variabilities were decreased by either technique, especially the deletion of silent segments, which resulted in the best diagnostic accuracy. The degree of intertext CPPS variability for the only-voiced samples was comparable to that of the CPPS variabilities in sustained vowels. Conclusions The sound-processing technique removing silent segments should be applied to enhance the diagnostic properties of CPPS. The additional technique of deleting unvoiced segments is worth adopting if clinicians and researchers seek to attenuate the influence of text differences in calculating CPPS values. |
| Databáze: | OpenAIRE |
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