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Contact quotient versus closed quotient: a comparative study on professional male singers

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dc.contributor.authorFilipa M.B., Lã
dc.contributor.authorSundberg, Johan
dc.contributor.authorFilipa M.B., Lã
dc.date.accessioned2024-05-20T11:22:00Z
dc.date.available2024-05-20T11:22:00Z
dc.date.issued2015-03
dc.description.abstractObjectives: The term “closed quotient” is frequently used for data derived both from inverse filtering and from electroglottography. In the former case it is defined as the ratio between the closed phase and the period, as measured in flow glottograms (FLOGG), while in the latter case it is defined as the time interval between the falling and rising parts of the electroglottogram (EGG), measured at some percentage of the peak-to-peak amplitude. The study aims at analyzing differences between EGG and FLOGG based closed quotients and their relationships with voice source parameters. Study Design: Comparative study Methods: FLOGG based and EGG based measures collected from five professional male singers were compared, under different pitch and loudness conditions. Results: As compared with the FLOGG based quotient, the EGG based quotient (i) varied more between subjects, (ii) presented greater values, (iii) varied less with subglottal pressure, (iv) varied less with the normalized amplitude quotient (i.e. the ratio between the flow pulse amplitude and the product of period and maximum flow declination rate), and (v) varied less with the relative amplitude of the voice source fundamental. Conclusions: Although positively related, FLOGG based and EGG based closed quotients differ and must not be confused.en
dc.description.versionversión final
dc.identifier.doihttps://doi.org/10.1016/j.jvoice.2014.07.005
dc.identifier.issn0892-1997
dc.identifier.urihttps://hdl.handle.net/20.500.14468/11807
dc.journal.issue2
dc.journal.titleJournal of Voice
dc.journal.volume29
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.urihttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subject.keywordsClosed quotient
dc.subject.keywordsContact Quotient
dc.subject.keywordsFlow glottogram
dc.subject.keywordsElectrolaryngography
dc.subject.keywordsVoice source analysis
dc.subject.keywordsInverse filtering
dc.subject.keywordsTrained male voices
dc.titleContact quotient versus closed quotient: a comparative study on professional male singerses
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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