ERIC Number: EJ1013840
Record Type: Journal
Publication Date: 2013-Oct
Abstractor: As Provided
Comparison of Nasal Acceleration and Nasalance across Vowels
Thorp, Elias B.; Virnik, Boris T.; Stepp, Cara E.
Journal of Speech, Language, and Hearing Research, v56 n5 p1476-1484 Oct 2013
Purpose: The purpose of this study was to determine the performance of normalized nasal acceleration (NNA) relative to nasalance as estimates of nasalized versus nonnasalized vowel and sentence productions. Method: Participants were 18 healthy speakers of American English. NNA was measured using a custom sensor, and nasalance was measured using the KayPentax Nasometer II. Speech stimuli consisted of CVC syllables with the vowels (/a/, /ae/, /i/, /u/) and sentences loaded with high front, high back, low front, and low back vowels in both nasal and nonnasal contexts. Results: NNA showed a small but significant effect of the vowel produced during syllable stimuli but no significant effect of vowel loading during sentence stimuli. Nasalance was significantly affected by the vowel being produced during both syllables and sentences with large effect sizes. Both NNA and nasalance were highly sensitive and specific to nasalization. Conclusions: NNA was less affected by vowel than nasalance. Discrimination of nasal versus nonnasal stimuli using NNA and nasalance was comparable, suggesting potential for use of NNA for biofeedback applications. Future work to improve calibration of NNA is needed to lower intersubject variability.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
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