City Research Online

Determining spectral stability in vowels: A comparison and assessment of different metrics

Genette, J., Rivera Espejo, J. M., Gillis, S. & Verhoeven, J. ORCID: 0000-0002-0738-8517 (2023). Determining spectral stability in vowels: A comparison and assessment of different metrics. Speech Communication, 154, article number 102984. doi: 10.1016/j.specom.2023.102984


This study investigated the performance of several metrics used to evaluate spectral stability in vowels. Four metrics suggested in the literature and a newly developed one were tested and compared to the traditional method of associating the spectrally stable portion with the middle of the vowel. First, synthetic stimuli whose spectrally stable portion had been defined in advance were used to evaluate the potential of the different metrics to capture spectral stability. Second, the output of the different metrics on the acoustic measurements obtained in the vowel portions identified as spectrally stable was compared on both synthesized and natural speech. It is clear that higher-dimensional features are needed to capture spectral stability and that the best-performing metrics yield acoustic measurements that are similar to those obtained in the middle of the vowel. This study empirically validates long-standing intuitions about the validity of selecting the middle section of vowels as the preferred method to identify the spectrally stable region in vowels.

Publication Type: Article
Additional Information: © 2023. This manuscript version is made available under the CC-BY-NC-ND 4.0 license in new tab/window)
Publisher Keywords: Spectral analysis, Methodology, Vowel target, Feature-selection, Speech synthesis
Subjects: P Language and Literature > P Philology. Linguistics
Departments: School of Health & Psychological Sciences
School of Health & Psychological Sciences > Language & Communication Science
SWORD Depositor:
[thumbnail of author_manuscript.pdf] Text - Accepted Version
This document is not freely accessible until 15 March 2025 due to copyright restrictions.

To request a copy, please use the button below.

Request a copy


Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email


Downloads per month over past year

View more statistics

Actions (login required)

Admin Login Admin Login