| 1. |
- Clermont, Frantz, et al.
(författare)
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F-pattern Analysis of Professional Imitations of "hallå" in three Swedish Dialects
- 2006
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Ingår i: Working Papers. ; 52, s. 25-28
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- We describe preliminary results of an acoustic-phonetic study of voice imitations, which is ultimately aimed towards developing an explanatory approach to similar-sounding voices. Such voices are readily obtained by way of imitations, which were elicited by asking an adult-male, professional imitator to utter two tokens of the Swedish word “hallå” in a telephone-answering situation and three Swedish dialects (Gothenburg, Stockholm, Skania). Formant-frequency (F1, F2, F3, F4) patterns were measured at several landmarks of the main phonetic segments (‘a’, ‘l’, ‘å’), and cross-examined using the imitator’s token-averaged F-pattern and those obtained by imitation. The final ‘å’-segment seems to carry the bulk of differences across imitations, and between the imitator’s patterns and those of his imitations. There is however a notable constancy in F1 and F2 from the ‘a’-segment nearly to the end of the ‘l’-segment, where the imitator seems to have had fewer degrees of articulatory freedom.
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| 2. |
- Sjöström, Maria, et al.
(författare)
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A bidialectal experiment on voice Identification
- 2008
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Ingår i: Working Papers,: Department of Linguistics and Phonetics, Lund University, Sweden. - Lund. ; 53, s. 145-158
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 3. |
- Sjöström, Maria, et al.
(författare)
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A Switch of Dialect as Disguise
- 2006
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Ingår i: Working Papers. ; 52, s. 113-116
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Criminals may purposely try to hide their identity by using a voice disguise such as imitating another dialect. This paper empirically investigates the power of dialect as an attribute that listeners use when identifying voices and how a switch of dialect affects voice identification. In order to delimit the magnitude of the perceptual significance of dialect and the possible impact of dialect imitation, a native bidialectal speaker was the target speaker in a set of four voice line-up experiments, two of which involved a dialect switch. Regardless of which dialect the bidialectal speaker spoke he was readily recognized. When the familiarization and target voices were of different dialects, it was found that the bidialectal speaker was significantly less well recognized. Dialect is thus a key feature for speaker identification that overrides many other features of the voice. Whether imitated dialect can be used for voice disguise to the same degree as native dialect switching demands further research.
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| 4. |
- Sjöström, Maria, et al.
(författare)
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A Switch of Dialect as Disguise
- 2006
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Ingår i: Proceedings from FONETIK 2006. ; , s. 113-116
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 5. |
- Zetterholm, Elisabeth, et al.
(författare)
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A case study of impersonation from a security systems point of view
- 2005
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- A professional impersonator has been studied when training his voice to mimic two target speakers. Training was performed by listening and/or using the output from a speaker verification system as feedback. Tests after training showed a significant increase in verfication score.
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| 6. |
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| 7. |
- Zetterholm, Elisabeth, et al.
(författare)
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Earwitnesses: The effect of voice differences in identification accuracy and the realism in confidence judgments
- 2009
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Ingår i: Proceedings FONETIK 2009: The XXIIth Swedish Phonetics Conference. ; , s. 180-185, s. 180-185
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Konferensbidrag (refereegranskat)abstract
- Individual characteristic features in voice and speech are important in ear witness identification. A target-absent lineup with six foils was used to analyze the influence of voice and speech features on recognition. The participants’ response for two voice foils were particularly successful in the sense that they were most often rejected. These voice foils were characterized by the features’ articulation rate and pitch in relation to the target voice. For the same two foils the participants as a collective also showed marked underconfidence and especially good ability to separate correct and incorrect identifications by means of their confidence judgments for their answers to the identification question. For the other four foils the participants showed very poor ability to separate correct from incorrect identification answers by means of their confidence judgments.
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