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Flow ball-assisted voice training: immediate effects on vocal fold contacting

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dc.contributor.authorFilipa M.B., Lã
dc.contributor.authorTernström, Sten
dc.contributor.authorFilipa M.B., Lã
dc.date.accessioned2024-05-20T11:21:38Z
dc.date.available2024-05-20T11:21:38Z
dc.date.issued2020-09-01
dc.description.abstractObjective Effects of exercises using a tool that promotes a semi-occluded artificially elongated vocal tract with real-time visual feedback of airflow – the flow ball – were tested using voice maps of EGG time-domain metrics. Methods Ten classically trained singers (5 males and 5 females) were asked to sing messa di voce exercises on eight scale tones, performed in three consecutive conditions: baseline (‘before’), flow ball phonation (‘during’), and again without the flow ball (‘after’). These conditions were repeated eight times in a row: one scale tone at a time, on an ascending whole tone scale. Audio and electroglottographic signals were recorded using a Laryngograph microprocessor. Vocal fold contacting was assessed using three time-domain metrics of the EGG waveform, using FonaDyn. The quotient of contact by integration, Qci, the normalized peak derivative, QΔ, and the index of contacting Ic, were quantified and compared between ‘before’ and ‘after’ conditions. Results Effects of flow ball exercises depended on singers’ habitual phonatory behaviours and on the position in the voice range. As computed over the entire range of the task, Qci was reduced by about 2% in five of ten singers. QΔ was 2–6% lower in six of the singers, and 3–4% higher only in the two bass-baritones. Ic decreased by almost 4% in all singers. Conclusion Overall, vocal adduction was reduced and a gentler vocal fold collision was observed for the ‘after’ conditions. Significance Flow ball exercises may contribute to the modification of phonatory behaviours of vocal pressedness.en
dc.description.versionversión final
dc.identifier.doihttps://doi.org/10.1016/j.bspc.2020.102064
dc.identifier.issn1746-8094
dc.identifier.urihttps://hdl.handle.net/20.500.14468/11790
dc.journal.titleBiomedical Signal Processing and Control
dc.journal.volume62
dc.language.isoen
dc.publisherElsevier
dc.relation.centerFacultad de Educación
dc.relation.departmentDidáctica, Organización Escolar y Didácticas Especiales
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject.keywordsFlow ball
dc.subject.keywordsSemi-occluded vocal tract
dc.subject.keywordsVocal fold contacting
dc.subject.keywordsFonaDyn
dc.titleFlow ball-assisted voice training: immediate effects on vocal fold contactinges
dc.typejournal articleen
dc.typeartículoes
dspace.entity.typePublication
relation.isAuthorOfPublicationb43e54ea-8c7f-4c09-bdea-6cc1c0b9710f
relation.isAuthorOfPublication.latestForDiscoveryb43e54ea-8c7f-4c09-bdea-6cc1c0b9710f
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