Evaluating the forensic importance of glottal source features through the voice analysis of twins and non-twin siblings
In this study we have analyzed 853 tokens of the vowel ller [e:], ex-tracted from spontaneous speech fragments of 54 male Spanish speakers (North-Central Peninsular variety), each one recorded on two separate sessions. Thespeakers — to be compared in a pairwise fashion – were divided in four groups:...
| Autores: | , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2014 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositório: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/362918 |
| Acesso em linha: | http://hdl.handle.net/10261/362918 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Forensic phonetics Glottal source Twins Siblings Biometry Phonation Linguistic research |
| Resumo: | In this study we have analyzed 853 tokens of the vowel ller [e:], ex-tracted from spontaneous speech fragments of 54 male Spanish speakers (North-Central Peninsular variety), each one recorded on two separate sessions. Thespeakers — to be compared in a pairwise fashion – were divided in four groups:24 monozygotic (MZ) twins, 10 dizygotic (DZ) twins, 8 non-twin brothers and12 unrelated speakers. From the extracted vowel llers, considered long enoughfor a glottal analysis (around 160 milliseconds), a vector of 68 glottal parame-ters was created. Our hypothesis that higher similarity values would be foundin the intra-pair comparison of MZ twins than in DZ twins, brothers or unrelatedspeakers was con rmed, which suggests that the glottal parameters under investi-gation are genetically in uenced. This nding seems of great forensic importance,as a phonetic parameter is considered forensically robust provided that it exhibitslarge between-speaker variation while it remains as consistent as possible for eachspeaker (i.e. small within-speaker variation) |
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