Evaluating the forensic importance of glottal source features through the voice analysis of twins and non-twin siblings

San Segundo, Eugenia and Gómez Vilda, Pedro (2014). Evaluating the forensic importance of glottal source features through the voice analysis of twins and non-twin siblings. "Language and Law / Linguagem e Direito", v. 1 (n. 2); pp. 22-41. ISSN 2183-3745.

Description

Title: Evaluating the forensic importance of glottal source features through the voice analysis of twins and non-twin siblings
Author/s:
  • San Segundo, Eugenia
  • Gómez Vilda, Pedro
Item Type: Article
Título de Revista/Publicación: Language and Law / Linguagem e Direito
Date: 2014
ISSN: 2183-3745
Volume: 1
Subjects:
Freetext Keywords: Forensic phonetics; Glottal source; Twins; Siblings; Biometry; Phonation
Faculty: E.T.S. de Ingenieros Informáticos (UPM)
Department: Arquitectura y Tecnología de Sistemas Informáticos
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In this study we have analyzed 853 tokens of the vowel filler [ei], extracted from spontaneous speech fragments of 54 male Spanish speakers (NorthCentral Peninsular variety), each one recorded on two separate sessions. The speakers — to be compared in a pairwise fashion - were divided in four groups: 24 monozygotic (MZ) twins, 10 dizygotic (DZ) twins, 8 non-twin brothers and 12 unrelated speakers. From the extracted vowel fillers, considered long enough for a glottal analysis (around 160 milliseconds), a vector of 68 glottal parameters was created. Our hypothesis that higher similarity values would be found in the intra-pair comparison ofMZ twins than in DZ twins, brothers or unrelated speakers was confirmed, which suggests that the glottal parameters under investigation are genetically influenced. This finding seems of great forensic importance, as a phonetic parameter is considered forensically robust provided that it exhibits large between-speaker variation while it remains as consistent as possible for each speaker (i.e. small within-speaker variation).

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainAP2008-01524UnspecifiedUnspecifiedBeca FPU - Programa Nacional de Formatión de Profesorado Universitario

More information

Item ID: 40911
DC Identifier: http://oa.upm.es/40911/
OAI Identifier: oai:oa.upm.es:40911
Official URL: https://ojs.letras.up.pt/index.php/LLLD/article/view/2430
Deposited by: Memoria Investigacion
Deposited on: 26 Oct 2016 08:29
Last Modified: 05 Jun 2019 17:26
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