The Feasibility of a Neck-Surface Accelerometer for Estimating the Amount of Acoustic Output During Phonation Regardless of the Difference in the Mouth Configuration
| Autor: | Masanori Umatani, Toshihiko Iwahashi, Makoto Ogawa, Hidenori Inohara, Chieri Kato, Kiyohito Hosokawa |
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| Rok vydání: | 2020 |
| Předmět: |
medicine.medical_specialty
Audiology Accelerometer Neck surface Speech Acoustics Loudness Correlation 030507 speech-language pathology & audiology 03 medical and health sciences Speech and Hearing 0302 clinical medicine Phonation Vowel Accelerometry medicine Humans 030223 otorhinolaryngology Sound pressure Mathematics Mouth Acoustics LPN and LVN Otorhinolaryngology Vocal effort Feasibility Studies 0305 other medical science |
| Zdroj: | Journal of voice : official journal of the Voice Foundation. 36(3) |
| ISSN: | 1873-4588 |
| Popis: | Summary Objectives This study aimed to assess the feasibility of a neck-surface accelerometer (ACC) for estimating the amount of acoustic output produced during phonation regardless of individual differences or the mouth configuration. Methods The sound pressure levels (SPL) and signals of a neck-surface ACC were simultaneously recorded, while each of healthy nondysphonic speakers was asked to perform the following phonatory tasks: (1) repetitive phonation of the vowel /e:/ at various loudness levels; (2) gradually increasing vocal loudness (crescendo) during sustained phonation of the vowel /e:/; (3) repetitive smooth transition between phonation of the vowel /a:/ and /u:/ with the same vocal effort or between phonation of the vowel /e:/ and production of a hum /m:/. The skin acceleration levels (SAL) were calculated from the ACC signals. Results Although the correlations between the SPL and SAL values were nearly linear in both repetitive-vowel-phonation and vowel-crescendo tasks, the crescendo task showed a higher correlation within individuals than the repetitive task, but with substantial individual differences. The correlation between the increments in the SPL and SAL was higher than that between the SPL and SAL. In the smooth-transition tasks, the SAL—but not the SPL—showed no significant differences between the vowels or hum. Conclusion These results show that the signal intensity of a neck-surface ACC reflects the amount of acoustic output during phonation irrespective of the mouth configuration, but shows nonnegligible individual differences. The use of the increment in the SAL is suggested to be suitable for comparing the amount of acoustic output. |
| Databáze: | OpenAIRE |
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