Glottal fry and voice disguise: a case study in forensic phonetics
Identifieur interne : 002B95 ( Main/Curation ); précédent : 002B94; suivant : 002B96Glottal fry and voice disguise: a case study in forensic phonetics
Auteurs : A. Hirson [Royaume-Uni] ; M. Duckworth [Royaume-Uni]Source :
- Journal of Biomedical Engineering [ 0141-5425 ] ; 1993.
Abstract
In recent legal proceedings, forensic phoneticians were called upon to analyse a tape-recorded message intended for the blackmail of a bank manager following the kidnap of his wife. The brief was to establish the likelihood that the tape recording may have been made by any one of three suspects, samples of whose speech were also made available. The comparison was greatly complicated by voice disguise employed by the speaker who recorded the kidnap tape. This disguise comprised a form of phonation described phonetically as ‘glottal fry’ or vocal ‘creak’. This form of phonation occurs normally in normal speech, but it has received most attention in relation to voice pathologies. On the other hand there are few references to its use as a form of voice disguise. This paper discusses the nature of the creak, and examines its effectiveness as voice disguise. In addition, a method is described for speaker identification regardless of the disguise. Results indicate that trained listeners without repeated presentations or instrumentation are able to match speakers with 65% accuracy when one voice is creaky, compared with 90% accuracy for undisguised voices. Using a Euclidean metric to compare the power spectra of the [s] sound, we find that creaky disguised voices may be correctly matched with the undisguised voice of the same speaker (9 distracters) in 5 cases out of 10. However, when the computer's task is made more similar to the perceptual task, selecting one speaker out of two, it achieves an accuracy of 81%. Implications for forensic phonetics are discussed.
Url:
DOI: 10.1016/0141-5425(93)90115-F
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: Pour aller vers cette notice dans l'étape Curation :001510
- to stream Istex, to step Curation: Pour aller vers cette notice dans l'étape Curation :001398
- to stream Istex, to step Checkpoint: Pour aller vers cette notice dans l'étape Curation :001299
- to stream Main, to step Merge: Pour aller vers cette notice dans l'étape Curation :003146
Links to Exploration step
ISTEX:ABBF74241C8619F618FBE6B2D9127051F522ECCBLe document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title>Glottal fry and voice disguise: a case study in forensic phonetics</title><author><name sortKey="Hirson, A" sort="Hirson, A" uniqKey="Hirson A" first="A." last="Hirson">A. Hirson</name></author><author><name sortKey="Duckworth, M" sort="Duckworth, M" uniqKey="Duckworth M" first="M." last="Duckworth">M. Duckworth</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:ABBF74241C8619F618FBE6B2D9127051F522ECCB</idno><date when="1993" year="1993">1993</date><idno type="doi">10.1016/0141-5425(93)90115-F</idno><idno type="url">https://api.istex.fr/document/ABBF74241C8619F618FBE6B2D9127051F522ECCB/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001510</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001510</idno><idno type="wicri:Area/Istex/Curation">001398</idno><idno type="wicri:Area/Istex/Checkpoint">001299</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">001299</idno><idno type="wicri:doubleKey">0141-5425:1993:Hirson A:glottal:fry:and</idno><idno type="wicri:Area/Main/Merge">003146</idno><idno type="wicri:Area/Main/Curation">002B95</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">Glottal fry and voice disguise: a case study in forensic phonetics</title><author><name sortKey="Hirson, A" sort="Hirson, A" uniqKey="Hirson A" first="A." last="Hirson">A. Hirson</name><affiliation wicri:level="1"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Speech Acoustics Laboratory, Department of Clinical Communication Studies, City University, Northampton Square, London EC1V 0HB</wicri:regionArea><wicri:noRegion>London EC1V 0HB</wicri:noRegion></affiliation></author><author><name sortKey="Duckworth, M" sort="Duckworth, M" uniqKey="Duckworth M" first="M." last="Duckworth">M. Duckworth</name><affiliation wicri:level="1"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Cardiff Institute of Higher Education, Faculty of Health and Community Studies, Llandaff Centre, Western Avenue, Cardiff CF5 2YB, Wales</wicri:regionArea><wicri:noRegion>Wales</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Biomedical Engineering</title><title level="j" type="abbrev">JBENG</title><idno type="ISSN">0141-5425</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1993">1993</date><biblScope unit="volume">15</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="193">193</biblScope><biblScope unit="page" to="200">200</biblScope></imprint><idno type="ISSN">0141-5425</idno></series><idno type="istex">ABBF74241C8619F618FBE6B2D9127051F522ECCB</idno><idno type="DOI">10.1016/0141-5425(93)90115-F</idno><idno type="PII">0141-5425(93)90115-F</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0141-5425</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In recent legal proceedings, forensic phoneticians were called upon to analyse a tape-recorded message intended for the blackmail of a bank manager following the kidnap of his wife. The brief was to establish the likelihood that the tape recording may have been made by any one of three suspects, samples of whose speech were also made available. The comparison was greatly complicated by voice disguise employed by the speaker who recorded the kidnap tape. This disguise comprised a form of phonation described phonetically as ‘glottal fry’ or vocal ‘creak’. This form of phonation occurs normally in normal speech, but it has received most attention in relation to voice pathologies. On the other hand there are few references to its use as a form of voice disguise. This paper discusses the nature of the creak, and examines its effectiveness as voice disguise. In addition, a method is described for speaker identification regardless of the disguise. Results indicate that trained listeners without repeated presentations or instrumentation are able to match speakers with 65% accuracy when one voice is creaky, compared with 90% accuracy for undisguised voices. Using a Euclidean metric to compare the power spectra of the [s] sound, we find that creaky disguised voices may be correctly matched with the undisguised voice of the same speaker (9 distracters) in 5 cases out of 10. However, when the computer's task is made more similar to the perceptual task, selecting one speaker out of two, it achieves an accuracy of 81%. Implications for forensic phonetics are discussed.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Rhénanie/explor/UnivTrevesV1/Data/Main/Curation
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002B95 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Curation/biblio.hfd -nk 002B95 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Rhénanie
|area= UnivTrevesV1
|flux= Main
|étape= Curation
|type= RBID
|clé= ISTEX:ABBF74241C8619F618FBE6B2D9127051F522ECCB
|texte= Glottal fry and voice disguise: a case study in forensic phonetics
}}
| This area was generated with Dilib version V0.6.31. |  |