{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,26]],"date-time":"2025-12-26T04:47:13Z","timestamp":1766724433566,"version":"3.48.0"},"reference-count":33,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2025,12,22]],"date-time":"2025-12-22T00:00:00Z","timestamp":1766361600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","award":["JBKYKJCX2024-3"],"award-info":[{"award-number":["JBKYKJCX2024-3"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Algorithms"],"abstract":"<jats:p>This study aims to examine the acoustic characteristics of Mandarin vowels produced by children with cochlear implants and to explore the differences in their speech production compared with those of children with normal hearing. We propose a multiview model-based method for vowel feature analysis. This approach involves extracting and fusing formant features, Mel-frequency cepstral coefficients (MFCCs), and linear predictive coding coefficients (LPCCs) to comprehensively represent vowel articulation. We conducted k-means clustering on individual features and applied multiview clustering to the fused features. The results showed that children with cochlear implants formed discernible vowel clusters in the formant space, though with lower compactness than those of normal-hearing children. Furthermore, the MFCCs and LPCCs features revealed significant inter-group differences. Most importantly, the multiview model, utilizing fused features, achieved superior clustering performance compared to any single feature. These findings demonstrated that effective fusion of frequency domain features provided a more comprehensive representation of phonetic characteristics, offering potential value for clinical assessment and targeted speech intervention in children with hearing impairment.<\/jats:p>","DOI":"10.3390\/a19010009","type":"journal-article","created":{"date-parts":[[2025,12,26]],"date-time":"2025-12-26T03:06:02Z","timestamp":1766718362000},"page":"9","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Acoustic Characteristics of Vowel Production in Children with Cochlear Implants Using a Multi-View Fusion Model"],"prefix":"10.3390","volume":"19","author":[{"given":"Qingqing","family":"Xie","sequence":"first","affiliation":[{"name":"School of Rehabilitation Engineering, China Civil Affairs University, Beijing 102600, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jing","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Software, Tiangong University, Tianjin 300387, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ling","family":"Du","sequence":"additional","affiliation":[{"name":"School of Software, Tiangong University, Tianjin 300387, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lifang","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Rehabilitation Engineering, China Civil Affairs University, Beijing 102600, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yanan","family":"Li","sequence":"additional","affiliation":[{"name":"School of Rehabilitation Engineering, China Civil Affairs University, Beijing 102600, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,12,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1044\/1092-4388(2013\/12-0112)","article-title":"A longitudinal study of very young children\u2019s vowel production","volume":"57","author":"McGowan","year":"2014","journal-title":"J. Speech Lang. Hear. Res."},{"key":"ref_2","first-page":"514","article-title":"Acoustic characteristics of vowel production in Urdu-speaking children with cochlear implant","volume":"12","author":"Haider","year":"2024","journal-title":"Kurdish Stud."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1243","DOI":"10.1044\/2024_JSLHR-23-00274","article-title":"Nasal\/oral vowel perception in French-speaking children with cochlear implants and children with typical hearing","volume":"67","author":"Fagniart","year":"2024","journal-title":"J. Speech Lang. Hear. Res."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"562","DOI":"10.1097\/AUD.0b013e31828d2bd6","article-title":"Interdependence of linguistic and indexical speech perception skills in school-age children with early cochlear implantation","volume":"34","author":"Geers","year":"2013","journal-title":"Ear Hear."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"2791","DOI":"10.1121\/1.4932165","article-title":"Acoustic properties of vowel production in prelingually deafened Mandarin-speaking children with cochlear implants","volume":"138","author":"Yang","year":"2015","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1017\/S0025100317000196","article-title":"Acoustic development of vowel production in native Mandarin-speaking children","volume":"49","author":"Yang","year":"2019","journal-title":"J. Int. Phon. Assoc."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"154","DOI":"10.1159\/000318879","article-title":"A comparison of vowel productions in prelingually deaf children using cochlear implants, severe hearing-impaired children using conventional hearing aids and normal-hearing children","volume":"63","author":"Baudonck","year":"2011","journal-title":"Folia Phoniatr. Logop."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"90S","DOI":"10.1097\/01.AUD.0000051744.24290.C1","article-title":"Acoustic characteristics of the speech of young cochlear implant users: A comparison with normal-hearing age-mates","volume":"24","author":"Uchanski","year":"2003","journal-title":"Ear Hear."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1080\/02699200400026991","article-title":"Acoustic analysis of the speech of children with cochlear implants: A longitudinal study","volume":"21","author":"Liker","year":"2007","journal-title":"Clin. Linguist. Phon."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"177","DOI":"10.1044\/1092-4388(2010\/09-0165)","article-title":"Speech production accuracy and variability in young cochlear implant recipients: Comparisons with typically developing age-peers","volume":"54","author":"Ertmer","year":"2011","journal-title":"J. Speech Lang. Hear. Res."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"060002","DOI":"10.1121\/2.0000055","article-title":"A spectral filtering method for tracking formants in children\u2019s speech","volume":"23","author":"Story","year":"2015","journal-title":"Proc. Mtgs. Acoust."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Hung, Y.-C., Lee, Y.-J., and Tsai, L.-C. (2017). Vowel production of Mandarin-speaking hearing aid users with different types of hearing loss. PLoS ONE, 12.","DOI":"10.1371\/journal.pone.0178588"},{"key":"ref_13","unstructured":"Gargouri, D., Kammoun, M.A., and Hamida, A.B. (2006, January 27\u201329). A comparative study of formant frequencies estimation techniques. Proceedings of the 5th WSEAS International Conference on Signal Processing, Istanbul, Turkey."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"107635","DOI":"10.1016\/j.apacoust.2020.107635","article-title":"Vowel characterization of Spanish speakers from Antioquia-Colombia using a specific-parameterized discrete wavelet transform analysis","volume":"172","author":"Simon","year":"2021","journal-title":"Appl. Acoust."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Loni, D.Y., and Subbaraman, S. (2014, January 15\u201317). Formant estimation of speech and singing voice by combining wavelet with LPC and Cepstrum techniques. Proceedings of the 2014 9th International Conference on Industrial and Information Systems (ICIIS), Gwalior, India.","DOI":"10.1109\/ICIINFS.2014.7036530"},{"key":"ref_16","first-page":"4085","article-title":"Isolated speech recognition using MFCC and DTW","volume":"2","author":"Dhingra","year":"2013","journal-title":"Int. J. Adv. Res. Electr. Electron. Instrum. Eng."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Aouani, H., and Ben Ayed, Y. (2018, January 21\u201324). Emotion recognition in speech using MFCC with SVM, DSVM and auto-encoder. Proceedings of the 2018 4th International Conference on Advanced Technologies for Signal and Image Processing (ATSIP), Sousse, Tunisia.","DOI":"10.1109\/ATSIP.2018.8364518"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"15509","DOI":"10.1007\/s11042-015-2894-9","article-title":"Comparative study of singing voice detection methods","volume":"75","author":"You","year":"2016","journal-title":"Multimed. Tools Appl."},{"key":"ref_19","first-page":"563","article-title":"Diagnostic of synchronous motor based on analysis of acoustic signals with application of LPCC and nearest mean classifier with cosine distance","volume":"55","author":"Glowacz","year":"2010","journal-title":"Arch. Metall. Mater."},{"key":"ref_20","unstructured":"Trabelsi, I., and Ben Ayed, D. (2014). On the use of different feature extraction methods for linear and non linear kernels. arXiv."},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Yang, H., Deng, Y., and Zhao, H.-A. (2019, January 10\u201312). A comparison of MFCC and LPCC with deep learning for speaker recognition. Proceedings of the 4th International Conference on Big Data and Computing (ICBDC \u201919), Guangzhou, China.","DOI":"10.1145\/3335484.3335528"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"101","DOI":"10.24191\/esteem.v19iMarch.21337","article-title":"Comparative analysis of LPC and MFCC for male speaker recognition in text-independent context","volume":"19","author":"Zailan","year":"2023","journal-title":"ESTEEM Acad. J."},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Misra, S., Das, T.K., Saha, P., Baruah, U., and Laskar, R.H. (2015, January 19\u201320). Comparison of MFCC and LPCC for a fixed phrase speaker verification system, time complexity and failure analysis. Proceedings of the 2015 International Conference on Circuits, Power and Computing Technologies (ICCPCT-2015), Nagercoil, India.","DOI":"10.1109\/ICCPCT.2015.7159307"},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Patil, S., and Kharate, G. (2022, January 15\u201316). Comparison of speech emotion recognition performance with different system features. Proceedings of the 3rd International Conference on Contents, Computing & Communication (ICCCC-2022), Bangalore, India. SSRN 4043566.","DOI":"10.2139\/ssrn.4043566"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"3099","DOI":"10.1121\/1.1795335","article-title":"A comparison of vowel normalization procedures for language variation research","volume":"116","author":"Adank","year":"2004","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"426","DOI":"10.1121\/1.4939894","article-title":"Relationship between tongue positions and formant frequencies in female speakers","volume":"139","author":"Lee","year":"2016","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"606","DOI":"10.1121\/1.1912396","article-title":"Classification of Russian vowels spoken by different listeners","volume":"49","author":"Lobanov","year":"1971","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_28","unstructured":"Thomas, E.R., and Kendall, T. (2025, December 14). NORM: The Vowel Normalization and Plotting Suite. Available online: https:\/\/lingtools.uoregon.edu\/norm\/."},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Terasawa, H., Slaney, M., and Berger, J. (2005, January 4\u20138). A timbre space for speech. Proceedings of the Interspeech 2005, Lisbon, Portugal.","DOI":"10.21437\/Interspeech.2005-285"},{"key":"ref_30","unstructured":"Rabiner, L.R., and Juang, B.-H. (1993). Fundamentals of Speech Recognition, Prentice Hall."},{"key":"ref_31","first-page":"41","article-title":"Speaker identification in emotional environments","volume":"8","author":"Shahin","year":"2009","journal-title":"Iran. J. Electr. Comput. Eng."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"24056","DOI":"10.1038\/s41598-024-73173-6","article-title":"Employing deep learning model to evaluate speech information in acoustic simulations of Cochlear implants","volume":"14","author":"Sinha","year":"2024","journal-title":"Sci. Rep."},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Portelli, D., Lombardo, C., Loteta, S., Galletti, C., Azielli, C., Ciodaro, F., Mento, C., Aguennouz, M., Rosa, G.D., and Alibrandi, A. (2025). Exploring the hearing improvement and parental stress in children with hearing loss using hearing aids or cochlear implants. J. Clin. Med., 14.","DOI":"10.3390\/jcm14010002"}],"container-title":["Algorithms"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1999-4893\/19\/1\/9\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,12,26]],"date-time":"2025-12-26T03:13:08Z","timestamp":1766718788000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1999-4893\/19\/1\/9"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,12,22]]},"references-count":33,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2026,1]]}},"alternative-id":["a19010009"],"URL":"https:\/\/doi.org\/10.3390\/a19010009","relation":{},"ISSN":["1999-4893"],"issn-type":[{"value":"1999-4893","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,12,22]]}}}