Contributions of Forward-Focused Voice to Audio-Vocal Feedback Measured Using Nasal Accelerometry and Power Spectral Analysis of Vocal Fundamental Frequency

Shao Hsuan Lee, Pao Chuan Torng, Guo She Lee*

*此作品的通信作者

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

Purpose: The spectral powers of the modulations of vocal fundamental frequency (fo) less than 3 Hz (low-frequency power, LFP) and between 3 and 8 Hz (middle-frequency power, MFP) had been established to indicate the audio-vocal feedback status and vocal efficiency of a speaker, and a resonant voice may enhance the auditory-vocal feedback. This study aims to determine whether the auditory feedback can be augmented by a forward and resonant voice and therefore contribute to the modulations of fo variability. Method: Vocal signals and accelerometric signals of lateral nasal cartilage were obtained from 27 healthy adults who, respectively, sustained vowels/a/ and/i/ with their habitual speaking voice and with a forward-focused voice under three auditory conditions: natural hearing (N0), high-level noise exposure (N90), and low-level noise exposure (N60). Nasal skin vibrations were measured using a nasal accelerometry to reflect voice resonance status. Vocal intensity and fo variability were also analyzed to show the auditory-vocal interactions under varied conditions of auditory feedback and voice resonance. Results: In both N0 and N90 conditions, forward-focused voice showed a significantly lower LFP than the speakers’ habitual voice. In addition, LFP of fo would significantly increase during natural voice production as the voice feedback was greatly masked by high-intensity noise; however, with a forward-focused voice, the noise-induced variation in LFP was significantly decreased. Under N90, MFP significantly decreased during forward-focused voice production compared with that measured during natural voice production. The stability of fo modulations was not adversely affected by N60. Conclusion: The results support the idea that vocalizing with a forward-focused voice enhances the auditory feedback of the speaker’s own voice and, thus, reduces the variability of fo during sustained phonation, especially when vocalizing in the high noise condition.

原文English
頁(從 - 到)1751-1766
頁數16
期刊Journal of Speech, Language, and Hearing Research
65
發行號5
DOIs
出版狀態Published - 5月 2022

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