ERIC Number: EJ1166329
Record Type: Journal
Publication Date: 2017-Dec
Abstractor: As Provided
Magnitude of Neck-Surface Vibration as an Estimate of Subglottal Pressure during Modulations of Vocal Effort and Intensity in Healthy Speakers
McKenna, Victoria S.; Llico, Andres F.; Mehta, Daryush D.; Perkell, Joseph S.; Stepp, Cara E.
Journal of Speech, Language, and Hearing Research, v60 n12 p3404-3416 Dec 2017
Purpose: This study examined the relationship between the magnitude of neck-surface vibration (NSV[subscript Mag]; transduced with an accelerometer) and intraoral estimates of subglottal pressure (P'[subscript sg]) during variations in vocal effort at 3 intensity levels. Method: Twelve vocally healthy adults produced strings of /p?/ syllables in 3 vocal intensity conditions, while increasing vocal effort during each condition. Measures were made of P'[subscript sg] (estimated during stop-consonant closure), NSV[subscript Mag] (measured during the following vowel), sound pressure level, and respiratory kinematics. Mixed linear regression was used to analyze the relationship between NSV[subscript Mag] and P'[subscript sg] with respect to total lung volume excursion, levels of lung volume initiation and termination, airflow, laryngeal resistance, and vocal efficiency across intensity conditions. Results: NSV[subscript Mag] was significantly related to P'[subscript sg] (p < 0.001), and there was a significant, although small, interaction between NSV[subscript Mag] and intensity condition. Total lung excursion was the only additional variable contributing to predicting the NSV[subscript Mag]-P'[subscript sg] relationship. Conclusions: NSV[subscript Mag] closely reflects P'[subscript sg] during variations of vocal effort; however, the relationship changes across different intensities in some individuals. Future research should explore additional NSV-based measures (e.g., glottal airflow features) to improve estimation accuracy during voice production.
Descriptors: Speech, Human Body, Acoustics, Measurement Equipment, Adults, Articulation (Speech), Phonemes, Vowels, Kinetics, Multiple Regression Analysis, Biomechanics
American Speech-Language-Hearing Association. 2200 Research Blvd #250, Rockville, MD 20850. Tel: 301-296-5700; Fax: 301-296-8580; e-mail: email@example.com; Web site: http://jslhr.pubs.asha.org
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Sponsor: National Institute on Deafness and Other Communication Disorders (NIDCD)
Authoring Institution: N/A
Grant or Contract Numbers: DC015570; DC015877; DC013017