{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,12]],"date-time":"2025-05-12T08:05:32Z","timestamp":1747037132554,"version":"3.37.3"},"reference-count":28,"publisher":"Georg Thieme Verlag KG","issue":"01","license":[{"start":{"date-parts":[[2022,11,10]],"date-time":"2022-11-10T00:00:00Z","timestamp":1668038400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int Arch Otorhinolaryngol"],"published-print":{"date-parts":[[2023,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Introduction\u2003The acoustic analysis of speech (measurements of the fundamental frequency and formant frequencies) of different vowels produced by speakers with the Angle class II, division 1, malocclusion can provide information about the relationship between articulatory and phonatory mechanisms in this type of maxillomandibular disproportion.<\/jats:p><jats:p>Objectives\u2003To investigate acoustic measurements related to the fundamental frequency (F0) and formant frequencies (F1 and F2) of the oral vowels of Brazilian Portuguese (BP) produced by male speakers with Angle class II, division 1, malocclusion (study group) and compare with men with Angle class I malocclusion (control group).<\/jats:p><jats:p>Methods\u2003In total, 60 men (20 with class II, 40 with class I) aged between 18 and 40 years were included in the study. Measurements of F0, F1 and F2 of the seven oral vowels of BP were estimated from the audio samples containing repetitions of carrier sentences. The statistical analysis was performed using the Student t-test and the effect size was calculated.<\/jats:p><jats:p>Results\u2003Significant differences (p-values) were detected for F0 values in five vowels ([e], [i], [\u1d10], [o] and [u]), and for F1 in vowels [a] and [\u1d10], with high levels for class II, division 1.<\/jats:p><jats:p>Conclusion\u2003Statistical differences were found in the F0 measurements with higher values in five of the seven vowels analysed in subjects with Angle class II, division 1. The formant frequencies showed differences only in F1 in two vowels with higher values in the study group. The data suggest that data on voice and speech production must be included in the protocol's assessment of patients with malocclusion.<\/jats:p>","DOI":"10.1055\/s-0041-1730428","type":"journal-article","created":{"date-parts":[[2022,11,10]],"date-time":"2022-11-10T23:44:36Z","timestamp":1668123876000},"page":"e10-e15","source":"Crossref","is-referenced-by-count":1,"title":["Acoustic Measurements of Speech and Voice in Men with Angle Class II, Division 1, Malocclusion"],"prefix":"10.1055","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1993-8288","authenticated-orcid":false,"given":"Fl\u00e1via","family":"Viegas","sequence":"additional","affiliation":[{"name":"Department of Speech Therapy, Universidade Federal Fluminense, Nova Friburgo, RJ, Brazil"},{"name":"Faculty of Medicine, Universidade de S\u00e3o Paulo, S\u00e3o Paulo, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8725-2419","authenticated-orcid":false,"given":"Zuleica","family":"Camargo","sequence":"additional","affiliation":[{"name":"Department of Philosophy, Communication, Language and Arts, Pontif\u00edcia Universidade Cat\u00f3lica de S\u00e3o Paulo, S\u00e3o Paulo, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9522-1388","authenticated-orcid":false,"given":"Danieli","family":"Viegas","sequence":"additional","affiliation":[{"name":"Voice Postgraduate Course, Pontif\u00edcia Universidade Cat\u00f3lica do Rio de Janeiro, Rio de Janeiro, RJ, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4573-1053","authenticated-orcid":false,"given":"Glaucio Serra","family":"Guimar\u00e3es","sequence":"additional","affiliation":[{"name":"Department of Dentistry, Universidade Federal 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