The abstract book can be viewed online or can be downloaded here.

Programme for IAFPA 25:





Chair Jonas Lindh

9:20 - 9:45

Brown: What’s in an unknown speech sample? The effect of the segmental content on automatic accent recognition

9:45 - 10:10

Kelly, Alexander, Forth, Kent, Lindh & Åkesson: Automatically identifying perceptually similar voices for voice parades

10:10 - 10:35

McDougall, Hudson & Atkinson: An investigation of the effect of listeners’ accent background on judgments of voice similarity

10:35 - 10:40

[SHORTS] Chan & Nolan: Correlations between Tonal f0 and Vowel Formants
Disner: Case report: A trademark case which relies crucially on phonetics and dialectology



Chair: Francis Nolan

11:00 - 11:25

Ross, French & Foulkes: UK Practitioners' Estimates of the Distribution of Speech Variants

11:25 - 11:50

Mok & Leung:  Vowel spaces and formant dynamics of bilingual speakers

11:50 - 12:15

Alexander, Forth, Atreya & Kelly: iVOCALISE: An i-vector-based automatic speaker recognition system using spectral and phonetic features

12:15 - 12:20

[SHORTS] Alexander et al: What's the point of what you said? 3D visualisation of speakers as points in i-vector space
Bénard: Beware of a specific pronunciation in voice comparison: a stuttering case in French

12:20 - 13:50

LUNCH; poster session 1

Chair: Erica Gold

13:50 - 14:15

González-Rodríguez & Franco-Pedroso: Formant-based Likelihood Ratios in Automatic Speaker Recognition from Linguistically-constrained i-vectors

14:15 - 14:40

San Segundo, Foulkes, French, Harrison and Hughes: Voice quality analysis in forensic voice comparison: developing the vocal profile analysis scheme

14:40 - 15:40

KEYNOTE: Tereza Neocleous: Statistics on trial



Chair: Richard Rhodes

16:00 - 17:30

SPECIAL SESSION - Combining the results of different feature analyses in forensic speaker comparison



Chair: Kirsty McDougall

9:20 - 9:45

He, Dimos & Dellwo: Between-speaker intensity variability in non-shouted and shouted voice: work in progress

9:45 - 10:10

Dimos, He & Dellwo: Measuring speaker-specific characteristics in shouting with controlled loudness

10:10 - 10:35

Vermeulen: Case report: from sound to speed. Calculating the speed of a truck from the sound of its engine.

10:35 - 10:40

[SHORTS] Hughes: Validity (huh) what is it good for?
Cao: Representative databases are needed to investigate the voice-body relationships of adult speakers



Chair: David van der Vloed

11:00 - 11:25

Milošević, Glavitsch, He & Dellwo: Segmental features for automatic speaker recognition in a flexible software framework

11:25 - 11:50

Lindh & Åkesson: Evaluation of Software ‘Error checks’ on the SweEval2016 Corpus for Forensic Speaker Comparison

11:50 - 12:15

Kelly & Hansen: Evaluation and calibration of Lombard effects in automatic speaker recognition

12:15 - 12:20

[SHORT] Harrison & Rhodes: The 'Black Box' misnomer

12:20 - 13:50

LUNCH; poster session 2 - work in progress/student posters

Chair: Peter French

13:50 - 14:15

Drygajlo, Jessen, Gfroerer, Wagner, Vermeulen & Niemi: The ENFSI-Monopoly project on Methodological Guidelines for Best Practice in Forensic Semiautomatic and Automatic Speaker Recognition

14:15 - 14:40

Rhodes: Cognitive bias in forensic speech science: a survey on risks and proposed safeguards

14:40 - 15:40

KEYNOTE: Gillian Tully - Quality standards for Speech and Audio Forensic Services



16:00 - 17:30





Conference Dinner
Merchant Adventurers' Hall; Fossgate, York YO1 9XD



Chair: Martin Duckworth

9:20 - 9:45

Tompkinson, Kelly, Weinberg & Watt: Spoken threats and the forensic phonetician: What role should we play?

9:45 - 10:10

Cambier-Langeveld: Validation data from the Blind Grouping Task

10:10 - 10:35

Dellwo: Auditory voice identification based on visual information: Listeners seem to rely on fine-grained temporal information

10:35 - 10:40

[SHORT] Kirchhübel, Bhagdin, French, Harrison, Rhodes & Wormald: Understanding of forensic speaker comparison conclusions in the legal setting



Chair: Tina Cambier-Langeveld

11:00 - 11:50

KEYNOTE: Peter French: Thirty years on…

12:00 - 13:00


13:00 - 16:00

SATELLITE SESSION: Accreditation and validation of forensic methods

Monday 25th July

Poster Session 1

12:20 - 13:50

Zdravka Biočina, Gordana Varošanec-Škarić & Jordan Bićanić

Comparison of F0 measures for male speakers of Croatian and Serbian

Honglin Cao & Jiangping Kong

Sex Differences of Vocal Tract Parameters and Their Correlations to Body Heights in Adult Humans

Paul De Decker

Drowning Out Voices: noise and forensic phonetic evidence

Sandra Ferrari Disner

Case report: A trademark case which relies crucially on phonetics and dialectology

Toby Hudson, Martin Duckworth, Kirsty McDougall & Jane Setter

Comparing and Interpreting Formant Values

Katherine Earnshaw

Assessing the Discriminatory Power of /t/ and /k/ for Forensic Speaker Comparison using a Likelihood Ratio Approach

Ben Gittelson, Yang Li, Adrian Leemann, David Britain & Marie-José Kolly

Preliminary UK population data on voice quality

Toby Hudson, Adrian Leemann, Marie-José Kolly, David Britain & Kirsty McDougall

Preliminary crowdsourced UK fundamental frequency population data for English speakers

Jonas Lindh, Joel Åkesson & Maria Sundqvist

Comparison of Perceptual and ASR Results on the SweE-val2016 Corpus

Elisa Pellegrino, Lei He & Volker Dellwo

A hybrid measure of speech rhythm: possible implications for LADO

Chen Shen

Vowel Prosody and the Individual: The Complexity of Speaker Profiling Using Non-native Speech

Radek Skarnitzl & Jitka Vaňková

Population statistics of Common Czech: F0 in multi-style tasks and voice disguise strategies

David van der Vloed, Geoffrey Morrison & Ewald Enzinger

Evaluation of Batvox under conditions reflecting those of a real forensic voice comparison case (forensic_eval_01)

Bruce Xiao Wang & Phil Rose

Forensic voice comparison with word-based acoustics: a likelihood ratio-based discrimination using F-pattern and tonal F0 trajectories over a disyllabic Cantonese word

Dominic Watt, Carmen Llamas, Peter French, Almut Braun & Duncan Robertson

Forensic aspects of spectral and durational variability in English schwa at the individual, community and regional levels

Jessica Wormald

Regional variation in Panjabi-English: a contact variety corpus

Caishun Zhong

The Validity of Vowel Formants for Cross-language Speaker Comparison



Tuesday 26th July

Poster Session 2 - Work in progress/Student posters

12:20 - 13:50

Allison Bennett

Proof of Concept: Developing a Language Awareness component to current Country of Origin training administered to Refugee and Asylum Officers

Sonia Cenceschi, Licia Sbattella & Roberto Tedesco

Crises during forensic examinations: observations and measurements in Italian spontaneous speech

Jordi Cicres & Núria Gavaldà

A preliminary analysis of the speaker-specificity of the first four spectral moments of Spanish fricatives

Mary Doromal

Bilingual and whispered speaker identification within a social network

Stefan Gfroerer

The EU-Speaker Identification Integrated Project (SiiP): Overview, Implications, and Open Questions

Erica Gold, Katherine Earnshaw & Sula Ross

West Yorkshire Regional English Database (WYRED)

Lillie Halton

Voicing the evidence: does it matter how we say it?

Hannah How

Disputed Utterance transcription choice. Can listeners be made to hear racial or religiously offensive language in degraded audio conditions?

Megan Jenkins

Accent disguise in a forensic context: Comparison of human and machine performance

Thayabaran Kathiresan, Volker Dellwo & Saikat Chatterjee

Speaker Identification Using Gaussian Mixture Model with Kronecker Covariance Matrix

Justin Jing Hoi Lo

The Effect of Bilingualism on Filled Pauses and their Discriminatory Power

Dieter Maurer, Thayabaran Kathiresan, Heidy Suter & Volker Dellwo

Vowel sounds produced with varying production parameters: Conceptualisation and realisation of a database

Sarah Mullings

An Acoustic Exploration of Hesitation Markers in Derby & Newcastle English

Hester Nauta, Jos Vermeulen & Willemijn Heeren

Within-speaker and between-speaker variation in articulation rate in forensically realistic speech

Piotr Pietryka

Differences in segmental features in L2 English speech of L1 Polish and Russian speakers - forensic speech comparison and profiling cases

Roland Ramthun

A new metric for comparing LTFDs

Sandra Schwab, Michael Amato, Volker Dellwo & Marianela Fernandez Trinidad

The effects of nicotine craving on voice quality

Selina Sutton

Combining vowel formants and automatic speaker recognition in forensic voice comparison

David van der Vloed & Michael Jessen

Matched and mismatched reference population language test performance of two FASR systems