Uso de técnicas acústicas para verificação de locutor em simulação experimental

Detalhes bibliográficos
Autor(a) principal: Machado, Aline de Paula
Data de Publicação: 2017
Outros Autores: Barbosa, Plínio Almeida
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://ojs.letras.up.pt/index.php/LLLD/article/view/2434
Resumo: The aim of this research was to investigate the eciency of a set of acoustic measures to identify one randomly pre-selected individual, named “the criminal”, out of a group of ten speakers of Brazilian Portuguese. Among the measures used were the first two formants of vowels, fundamental frequency, the duration of syllables and vowels, formant movement rate, intensity and the standard deviation of consonantal interval durations (∆C). We analyzed all the Brazilian Portuguese vowels. All the subjects were speakers of Brazilian Portuguese from the states of São Paulo, Rio Grande do Sul, Pará and Bahia. All the samples were extracted from interviews recorded in low quality acoustic environments. The samples were divided into two groups i) interviews and ii) recorded telephone conversations (mobile phone to mobile phone). The parameters that were most robust were rhythm and timing, such as duration, speech rate, ∆C and formant movement rate for the second formant. Because of their interspeaker variability, timing measures proved to be highly discriminative. The statistical tests showed that the speech of three of the subjects contained similarities to that of “the criminal”.
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spelling Uso de técnicas acústicas para verificação de locutor em simulação experimentalArticlesThe aim of this research was to investigate the eciency of a set of acoustic measures to identify one randomly pre-selected individual, named “the criminal”, out of a group of ten speakers of Brazilian Portuguese. Among the measures used were the first two formants of vowels, fundamental frequency, the duration of syllables and vowels, formant movement rate, intensity and the standard deviation of consonantal interval durations (∆C). We analyzed all the Brazilian Portuguese vowels. All the subjects were speakers of Brazilian Portuguese from the states of São Paulo, Rio Grande do Sul, Pará and Bahia. All the samples were extracted from interviews recorded in low quality acoustic environments. The samples were divided into two groups i) interviews and ii) recorded telephone conversations (mobile phone to mobile phone). The parameters that were most robust were rhythm and timing, such as duration, speech rate, ∆C and formant movement rate for the second formant. Because of their interspeaker variability, timing measures proved to be highly discriminative. The statistical tests showed that the speech of three of the subjects contained similarities to that of “the criminal”.Faculdade de Letras da Universidade do Porto2017-05-30info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttps://ojs.letras.up.pt/index.php/LLLD/article/view/2434por2183-3745Machado, Aline de PaulaBarbosa, Plínio Almeidainfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-01-13T03:47:03Zoai:ojs.letras.up.pt/ojs:article/2434Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:31:20.515618Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Uso de técnicas acústicas para verificação de locutor em simulação experimental
title Uso de técnicas acústicas para verificação de locutor em simulação experimental
spellingShingle Uso de técnicas acústicas para verificação de locutor em simulação experimental
Machado, Aline de Paula
Articles
title_short Uso de técnicas acústicas para verificação de locutor em simulação experimental
title_full Uso de técnicas acústicas para verificação de locutor em simulação experimental
title_fullStr Uso de técnicas acústicas para verificação de locutor em simulação experimental
title_full_unstemmed Uso de técnicas acústicas para verificação de locutor em simulação experimental
title_sort Uso de técnicas acústicas para verificação de locutor em simulação experimental
author Machado, Aline de Paula
author_facet Machado, Aline de Paula
Barbosa, Plínio Almeida
author_role author
author2 Barbosa, Plínio Almeida
author2_role author
dc.contributor.author.fl_str_mv Machado, Aline de Paula
Barbosa, Plínio Almeida
dc.subject.por.fl_str_mv Articles
topic Articles
description The aim of this research was to investigate the eciency of a set of acoustic measures to identify one randomly pre-selected individual, named “the criminal”, out of a group of ten speakers of Brazilian Portuguese. Among the measures used were the first two formants of vowels, fundamental frequency, the duration of syllables and vowels, formant movement rate, intensity and the standard deviation of consonantal interval durations (∆C). We analyzed all the Brazilian Portuguese vowels. All the subjects were speakers of Brazilian Portuguese from the states of São Paulo, Rio Grande do Sul, Pará and Bahia. All the samples were extracted from interviews recorded in low quality acoustic environments. The samples were divided into two groups i) interviews and ii) recorded telephone conversations (mobile phone to mobile phone). The parameters that were most robust were rhythm and timing, such as duration, speech rate, ∆C and formant movement rate for the second formant. Because of their interspeaker variability, timing measures proved to be highly discriminative. The statistical tests showed that the speech of three of the subjects contained similarities to that of “the criminal”.
publishDate 2017
dc.date.none.fl_str_mv 2017-05-30
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
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dc.identifier.uri.fl_str_mv https://ojs.letras.up.pt/index.php/LLLD/article/view/2434
url https://ojs.letras.up.pt/index.php/LLLD/article/view/2434
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language por
dc.relation.none.fl_str_mv 2183-3745
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dc.publisher.none.fl_str_mv Faculdade de Letras da Universidade do Porto
publisher.none.fl_str_mv Faculdade de Letras da Universidade do Porto
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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