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Speaker-individuality in Fujisaki model f0 features: implications for forensic voice comparison


Leemann, Adrian; Mixdorff, Hansjörg; O'Reilly, Maria; Kolly, Marie-José; Dellwo, Volker (2014). Speaker-individuality in Fujisaki model f0 features: implications for forensic voice comparison. International Journal of Speech, Language and the Law, 21(2):343-370.

Abstract

Fundamental frequency (f0) is a highly speaker-specific feature. Consequently, practi- tioners often use f0 information in forensic casework. Current research principally exam- ines the use of long-term f0 statistics such as f0 means and standard deviations for forensic voice comparison. The present study investigates how short-term f0 features such as measured by the Fujisaki intonation model capture speaker-individuality. Based on data of a homogeneous group of Zurich German speakers, we conducted an experiment on a large corpus of read speech and on a subset of sentences that included speaking style variability (spontaneous vs read). The latter is characteristic of forensic casework. Speak- ers demonstrated high between-speaker variability and low within-speaker variability across the two speaking styles for a number of f0 features. Given this evidence of speaker- individuality, we discuss Fujisaki f0 features’ potential for forensic voice comparison.

Fundamental frequency (f0) is a highly speaker-specific feature. Consequently, practi- tioners often use f0 information in forensic casework. Current research principally exam- ines the use of long-term f0 statistics such as f0 means and standard deviations for forensic voice comparison. The present study investigates how short-term f0 features such as measured by the Fujisaki intonation model capture speaker-individuality. Based on data of a homogeneous group of Zurich German speakers, we conducted an experiment on a large corpus of read speech and on a subset of sentences that included speaking style variability (spontaneous vs read). The latter is characteristic of forensic casework. Speak- ers demonstrated high between-speaker variability and low within-speaker variability across the two speaking styles for a number of f0 features. Given this evidence of speaker- individuality, we discuss Fujisaki f0 features’ potential for forensic voice comparison.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:06 Faculty of Arts > Department of Comparative Linguistics
Dewey Decimal Classification:490 Other languages
890 Other literatures
410 Linguistics
Language:English
Date:2014
Deposited On:26 Feb 2015 16:17
Last Modified:27 May 2016 08:27
Publisher:Equinox Publishing Ltd.
ISSN:1748-8885
Funders:Swiss National Science Foundation
Publisher DOI:https://doi.org/10.1558/ijsll.v21i2.343
Official URL:http://www.equinoxpub.com/journals/index.php/IJSLL/article/view/20485
Permanent URL: https://doi.org/10.5167/uzh-109105

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