Geoffrey Stewart
Morrison

BSc     MTS     MA     PhD



Other pages:
Morrison & Enzinger, Independent Forensic Consultants
Forensic Voice Comparison portal



| Appointments |

| Research Interests |

| News |

| Publications etcetera |

Forensic Science · Speech Perception & Acoustic Phonetics · Databases & Software · Popular Press · Other

| Research Projects |

| Teaching |

| Contact |


Current
&
Recent
Appointments



  • Independent Forensic Consultant
    2013–present


  • Scientific Counsel
    Office of Legal Affairs
    INTERPOL General Secretariat
    April – September 2015



  • Adjunct Professor
    Alberta Phonetics Laboratory
    Department of Linguistics
    University of Alberta
    2015–present
    Adjunct Associate Professor
    2010–2015


  • Director
    Forensic Voice Comparison Laboratory
    School of Electrical Engineering and Telecommunications
    University of New South Wales
    2010–2013



  • Subject Editor
    Speech Communication
    2012–2014
    Member of the Editorial Board
    2015–present


  • Chair
    Forensic Acoustics Subcommittee
    Acoustical Society of America
    2010–2013




Research
Interests


  • Evaluation and interpretation of forensic evidence

  • Forensic speech science

  • Statistical modelling

  • Speech perception




News


June 2016 – June 2018

– Ewald Enzinger and I are running a Multi-laboratory evaluation of forensic voice comparison systems under conditions reflecting those of a real forensic case (forensic_eval_01)

– Results of evaluations of systems will be published in a Virtual Special Issue of Speech Communication


January 2016 – February 2017

– I’m guest editor for a special issue in Science & Justice on measuring and reporting the precision of forensic likelihood ratios

Call for papers

Introductory paper

– Submission deadines and instructions:

  • position papers: 15 May 2016

    • For anyone who is struggling with meeting the deadline, I can offer an extension until the end of June, but on the condition that you (re)confirm your intent to submit before the end of May (and I would request that you submit earlier than the end of June if you can). Please send me an e-mail to request an extension.

    • Submit your manuscript at http://ees.elsevier.com/scijus/, choose from the Article Type dropdown: “SI: Precision of likelihood ratios”

    • There are a couple of sections (listed below) that the system asks for, but which I don’t need. You don’t have to waste your time filling them in. For the first one, just type “not applicable”, for the second one you will have to upload a file but it can be a text file with “not applicable” as the content.
      • Enter Comments: You are requested to provide names and addresses (including phone and fax numbers and e-mail addresses) of at least 3 individuals of recognized competence who may be considered as reviewers for your manuscript. Please also state any individual you would not like to be contacted as reviewers for your manuscript.
      • Attach Files:
        2. Novelty Statement

  • response papers: 15 October 2016

  • reply papers: 15 February 2017


August–November 2016

– I’m a Simons Foundation Visiting Fellow in the Probability and Statistics in Forensic Science Programme of the Isaac Newton Institute for Mathematical Sciences, Cambridge, England, United Kingdom.


June 2016

– I’m a panel speaker in a session on forensic and investigative speaker regognition at the Odyssey Speaker and Language Recognition Workshop, Bilbao, The Basque Country, 21–24 June 2016

May 2016

– I was an invited speaker at the Netherlands Forensic Institute Workshop on Theory and Implementation of Numerical Likelihood Ratio Methods, The Hague, The Netherlands, 23–24 May 2016

May 2016

– I was an invited speaker at the NIST Workshop on Quantifying the Weight of Forensic Evidence, Gaithersburg, MD, USA, 5–6 May 2016, part of the International Biometric Performance Testing Conference 2016

April 2016



– I gave a presentation at the National Center for Forensic Science, University of Central Florida, Orlando, FL, USA, 25 April 2016, MSB 318 1:00–2:00 pm

April – June 2016

– INTERPOL survey of the use of speaker identification by law enforcement agencies

April 2016


Quando l’intercettazione è ambigua


March–April 2016


– I gave a pre-conference workshop and am a plenary speaker at the 18th Conference on Spoken English at Villetaneuse (ALOES 2016), Paris, France, 31 March – 2 April 2016

March 2016


Forensic frontiers: Whose voice is that?


January 2016

– Presentations at the NIST OSAC meeting:

December 2015


Speech forensics: When Hollywood seldom mirrors real-life court cases


December 2015


President’s Council of Advisors on Science and Technology - Forensic Science Questions

November 2015

¿Qué hay en una voz? / ¿Què hi ha en una veu?


November 2015

Workshop on Bayesian resoning at XXIII Congresso Nacional De Criminalística - Brasil - 08 a 12 de novembro 2015

Video: TV Globo Rio de Janeiro, RJTV 1ª Edição (2015-11-09) Congresso de Criminalística vai até quinta-feira, em Búzios.


November 2015

Visit to Universidad Austral de Chile


November 2015


– Piece in New Trail (University of Alberta Alumni Magazine):
Real-life CSI: finding a voice in a haystack: New forensic method identifies voices to help nab criminals


October 2015

Statement regarding the UK Parliamentary Office of Science and Technology 2015 briefing on Forensic Linguistics


2015–2016

Image below retreived 18 Febrary 2015. Click on image to enlarge.
click on image to enlarge

– Morrison (2011) “Measuring the validity and reliability of forensic likelihood-ratio systems” ranked as the most cited paper published in Science & Justice within the previous 5 years.


November 2013, ongoing

Volunteers Wanted for Forensic Science Research

The Alberta Phonetics Laboratory @ The University of Alberta is conducting research on forensic voice comparison, and we are looking for volunteers to help us with this research.

The purpose of the research is to demonstrate how to perform forensic voice comparison under conditions reflecting those of an actual case. We are basing this research on the conditions of an element of the Saskatchewan robocall scandal in which the outgoing voicemail message of a speaker of known identity had to be compared with the outgoing voicemail message of a speaker of questioned identity.

http://www.ottawacitizen.com/news/Tories+admit+they+sent+Saskatchewan+robocall/7922470/story.html

Our approach is based on relevant data, quantitative measurements, and statistical models, and we test the validity and reliability of our system under conditions reflecting those of the case under investigation.

Volunteers will be asked to make five telephone calls over the course of a week and each time leave the message: “You’ve reached Haste Research. Please leave your name, phone number and reason for call, and I’ll return your call as soon as possible.”

Volunteers completing the task will be given a gift certificate of $25 value.

If you are an adult male speaker of Canadian English, and are interested in participating, please send the following e-mail message to <apl@ualberta.ca> with subject line “potential volunteer”.

I am interested participating in the forensic voicemail research study. Please contact me by e-mail and telephone to give me more information so I can decide whether I want to participate. My telephone number is _______

Alberta Phonetics Laboratory, University of Alberta, Edmonton AB, T6G 2E7, Canada
tel: (780)248 1409 mailbox 0, fax: (780) 492 0806, e-mail: apl@ualberta.ca, website: http://aphl.artsrn.ualberta.ca/

Principal Investigator: Dr Geoffrey Stewart Morrison, http://geoff-morrison.net/




Publications et cetera:

Forensic
Science


Special issue on measuring and reporting the precision of forensic likelihood ratios: Introduction to the debate
Morrison, G. S. (2016). Science & Justice, XX, xx–xx.
doi:10.1016/j.scijus.2016.05.002




What should a forensic practitioner’s likelihood ratio be?
Position Paper in the Science & Justice Virtual Special Issue on on measuring and reporting the precision of forensic likelihood ratios
Morrison, G. S., Enzinger, E. (in press). Science & Justice, XX, xx–xx.
doi:10.1016/j.scijus.2016.05.007



  • Matlab code: combine_imprecise_priors_LR


INTERPOL survey of the use of speaker identification by law enforcement agencies
Morrison, G. S., Sahito, F. H., Jardine, G., Djokic, D., Clavet, S., Berghs, S., Goemans Dorny, C. (2016). Forensic Science International, 263, 92–100.
doi:10.1016/j.forsciint.2016.03.044


Response to forensic science questions posed by President’s Council of Advisors on Science and Technology
Morrison (2015-12-04)
http://forensic-evaluation.net/PCAST2015/


Statement regarding the UK Parliamentary Office of Science and Technology 2015 briefing on Forensic Linguistics
Morrison, G. S. (2015-10-21)
http://forensic-evaluation.net/POSTnote509/


A demonstration of the application of the new paradigm for the evaluation of forensic evidence under conditions reflecting those of a real forensic-voice-comparison case.
Enzinger, E., Morrison, G. S., Ochoa, F. (2015/2016) Science & Justice, 56, 42–57.
doi:10.1016/j.scijus.2015.06.005



  • Audio examples


Mismatched distances from speakers to telephone in a forensic-voice-comparison case
Enzinger, E., Morrison, G. S. (2015). Speech Communication, 70, 28–41.
doi:10.1016/j.specom.2015.03.001




Calculation of forensic likelihood ratios: Use of Monte Carlo simulations to compare the output of score-based approaches with true likelihood-ratio values
Morrison, G. S. (2015). Research Report.
Stable URL: http://geoff-morrison.net/#ICFIS2014


Critique by Dr Geoffrey Stewart Morrison of a forensic voice comparison report submitted by Mr Edward J Primeau in relation to a section of audio recording which is alleged to be a recording of the voice of Dr Marlo Raynolds
(2014-11-30)
http://forensic-evaluation.net/raynolds/


Likelihood ratio calculation for a disputed-utterance analysis with limited available data.
Morrison, G.S., Lindh, J., Curran, J.M. (2014). Speech Communication, 58, 81–90.
doi:10.1016/j.specom.2013.11.004



  • Matlab and R code


Forensic strength of evidence statements should preferably be likelihood ratios calculated using relevant data, quantitative measurements, and statistical models – a response to Lennard (2013) Fingerprint identification: How far have we come?
Morrison, G. S., Stoel R. D. (2014). Australian Journal of Forensic Sciences, 46, 282–292.
doi:10.1080/00450618.2013.833648




Distinguishing between forensic science and forensic pseudoscience: Testing of validity and reliability, and approaches to forensic voice comparison.
Morrison, G.S. (2014). Science & Justice, 54, 245–256.
doi:10.1016/j.scijus.2013.07.004




Forensic audio analysis – Review: 2010–2013.
Grigoras, C., Smith, J. M., Morrison, G. S., Enzinger, E. (2013). In: NicDaéid, N. (Ed.), Proceedings of the 17th International Forensic Science Mangers’ Symposium, Lyon (pp. 612–637). Lyon, France: Interpol.


Effects of telephone transmission on the performance of formant-trajectory-based forensic voice comparison – female voices.
Zhang, C., Morrison, G.S., Enzinger, E., Ochoa, F. (2013). Speech Communication, 55, 796–813.
doi:10.1016/j.specom.2013.01.011




Reliability of human-supervised formant-trajectory measurement for forensic voice comparison.
Zhang, C., Morrison, G. S., Ochoa, F., Enzinger E. (2013). Journal of the Acoustical Society of America, 133, EL54–EL60.
doi:10.1121/1.4773223


Tutorial on logistic-regression calibration and fusion: Converting a score to a likelihood ratio.
Morrison, G. S. (2013). Australian Journal of Forensic Sciences, 45, 173–197.
doi:10.1080/00450618.2012.733025

  • typsetting errata




Vowel inherent spectral change in forensic voice comparison.
Morrison, G. S. (2013). In G. S. Morrison & P. F. Assmann (Eds.) Vowel inherent spectral change (pp. 263–283). Heidelberg, Germany: Springer-Verlag.
doi:10.1007/978-3-642-14209-3_11




The importance of using between-session test data in evaluating the performance of forensic-voice-comparison systems.
Enzinger, E., Morrison, G. S. (2012). Proceedings of the 14th Australasian International Conference on Speech Science and Technology, Sydney (pp. 137–140). Australasian Speech Science and Technology Association.


Human-supervised and fully-automatic formant-trajectory measurement for forensic voice comparison – Female voices.
Zhang, C., Morrison, G. S., Enzinger, E., Ochoa, F. (2012). Laboratory Report. Forensic Voice Comparison Laboratory, School of Electrical Engineering & Telecommunications, University of New South Wales, Sydney, Australia.
Stable URL: http://geoff-morrison.net/#_2012LabRepFormants


Response to Draft Australian Standard: DR AS 5388.3 Forensic analysis - Part 3 - Interpretation
Morrison, G. S., Evett, I. W., Willis, S. M., Champod, C., Grigoras, C., Lindh, J., Fenton, N., Hepler, A., Berger, C. E. H., Buckleton, J. S., Thompson, W. C. , González-Rodríguez, J., Neumann, C., Curran, J. M., Zhang, C., Aitken, C. G. G., Ramos, D., Lucena-Molina, J. J., Jackson, G., Meuwly, D., Robertson, B., Vignaux, G. A. (2012).
Stable URL: http://geoff-morrison.net/#_2012DraftStandResp
Stable URL: http://forensic-evaluation.net/australian-standards/#Morrison_et_al_2012


Database selection for forensic voice comparison.
Morrison, G. S., Ochoa, F., & Thiruvaran, T. (2012). Proceedings of Odyssey 2012: The Language and Speaker Recognition Workshop, Singapore, 62–77.


Voice source features for forensic voice comparison – an evaluation of the Glottex® software package.
Enzinger, E., Zhang, C., & Morrison, G. S. (2012). Proceedings of Odyssey 2012: The Language and Speaker Recognition Workshop, Singapore, 78–85.


What did Bain really say? A preliminary forensic analysis of the disputed utterance based on data, acoustic analysis, statistical models, calculation of likelihood ratios, and testing of validity.
Morrison, G. S., & Hoy, M. C. (2012). Proceedings of the 46th Audio Engineering Society (AES) Conference on Audio Forensics: Recording, Recovery, Analysis, and Interpretation, Denver, CO, 203–207.




Protocol for the collection of databases of recordings for forensic-voice-comparison research and practice.
Morrison, G. S., Rose, P., & Zhang, C. (2012). Australian Journal of Forensic Sciences, 44, 155–167.
doi:10.1080/00450618.2011.630412




The likelihood-ratio framework and forensic evidence in court: A response to R v T.
Morrison, G. S. (2012). International Journal of Evidence and Proof, 16, 1–29.
doi:10.1350/ijep.2012.16.1.390



  • Erratum: Table 1, fourth line of numbers should read: “1000–10 000”, not “100–10 000”


Forensic voice comparison using Chinese /iau/.
Zhang, C., Morrison, G.S., & Thiruvaran, T. (2011). Proceedings of the17th International Congress of Phonetic Sciences, Hong Kong, China
, 2280–2283.


Humans versus machine: Forensic voice comparison on a small database of Swedish voice recordings.
Lindh, J., & Morrison, G.S. (2011). Proceedings of the17th International Congress of Phonetic Sciences, Hong Kong, China
, 1254–1257.


Measuring the validity and reliability of forensic likelihood-ratio systems.
Morrison, G.S. (2011). Science & Justice, 51, 91–98.
doi:10.1016/j.scijus.2011.03.002



  • Matlab Code: CI_calcs 2011-03-30.


A comparison of procedures for the calculation of forensic likelihood ratios from acoustic-phonetic data: Multivariate kernel density (MVKD) versus Gaussian mixture model - universal background model (GMM-UBM).
Morrison, G.S. (2011). Speech Communication, 53, 242–256.
doi:10.1016/j.specom.2010.09.005



  • Matlab Code: MVKD_v_GMM-UBM 2010-02-19


An issue in the calculation of logistic-regression calibration and fusion weights for forensic voice comparison.
Morrison, G.S., Thiruvaran, T., & Epps, J. (2010). Proceedings of the 13th Australasian International Conference on Speech Science and Technology, Melbourne, 74–77.


Forensic voice comparison.
Morrison, G.S. (2010). In I. Freckelton, & H. Selby (Eds.), Expert Evidence (Ch. 99). Sydney, Australia: Thomson Reuters.


Estimating the precision of the likelihood-ratio output of a forensic-voice-comparison system.
Morrison, G.S., Thiruvaran, T., & Epps, J. (2010). Proceedings of Odyssey 2010: The Speaker and Language Recognition Workshop, Brno, 63–70.


An empirical estimate of the precision of likelihood ratios from a forensic-voice-comparison system.
Morrison, G.S., Zhang, C., & Rose, P. (2011). Forensic Science International, 208, 59–65.
doi:10.1016/j.forsciint.2010.11.001




Comparación forense de la voz y el cambio de paradigma.
Morrison, G.S. (2011). CSIC/UIMP Posgrado Oficial en Estudios Fónicos Cuadernos de Trabajo, 1, 1–38.
[Translation by Curiá C. of: Morrison, G.S. (2009). Forensic voice comparison and the paradigm shift. Science & Justice, 49, 298–308.]


Forensic voice comparison and the paradigm shift.
Morrison, G.S. (2009). Science & Justice, 49, 298–308.
doi:10.1016/j.scijus.2009.09.002




Comments on Coulthard & Johnson’s (2007) portrayal of the likelihood-ratio framework.
Morrison, G.S. (2009). Australian Journal of Forensic Sciences, 41, 155–161.
doi:10.1080/00450610903147701




A reponse to the UK position statement on forensic speaker comparison.
Rose, P., & Morrison, G.S. (2009). International Journal of Speech, Language and the Law, 16, 139–163.
doi:10.1558/ijsll.v16i1.139




Likelihood-ratio-based forensic speaker comparison using parametric representations of vowel formant trajectories.
Morrison, G.S. (2009). Journal of the Acoustical Society of America, 125, 2387–2397.
doi:10.1121/1.3081384




Automatic-type calibration of traditionally derived likelihood ratios: Forensic analysis of Australian English /o/ formant trajectories.
Morrison, G.S., & Kinoshita, Y. (2008). Proceedings of Interspeech 2008 (pp. 1501–1504). International Speech Communication Association.


Forensic speaker recognition of Chinese /i/ and /y/ using likelihood ratios.
Zhang, C., Morrison, G.S., & Rose, P. (2008). Proceedings of Interspeech 2008 (pp. 1937–1940). International Speech Communication Association.


Forensic voice comparison using likelihood ratios based on polynomial curves fitted to the formant trajectories of Australian English /a
I/.
Morrison, G.S. (2008). International Journal of Speech, Language and the Law, 15, 249–266.
doi:10.1558/ijsll.v15i2.249

Incorrect versions of Figures 3 and 4 were printed in the paper version. These have been corrected in the online vesion.




Speech
Perception
&
Acoustic
Phonetics


Vowel inherent spectral change.
Morrison, G.S., & Assmann, P.F. (Eds.) (2013). Heidelberg, Germany: Springer-Verlag. ISBN: 978-3-642-14208-6 (print) / 978-3-642-14209-3 (online).
doi:10.1007/978-3-642-14209-3


Theories of vowel inherent spectral change: A review.
Morrison, G. S. (2013). In G. S. Morrison & P. F. Assmann (Eds.) Vowel inherent spectral change (pp. 31–47). Heidelberg, Germany: Springer-Verlag.
doi:10.1007/978-3-642-14209-3_3



Perception of natural vowels by monolingual Canadian-English, Mexican-Spanish, and Peninsular-Spanish listeners.
Morrison, G.S. (2012). Canadian Acoustics, 40(4), 29–39.
http://jcaa.caa-aca.ca/index.php/jcaa/article/view/2580


Analysis of categorical response data: Use logistic regression rather than endpoint-difference scores or discriminant analysis (L).
Morrison, G.S., & Kondaurova, M.V. (2009). Journal of the Acoustical Society of America, 126, 2159–2162.
doi:10.1121/1.3216917



L1-Spanish speakers’ acquisition of the English /i/–/I/ contrast II: Perception of vowel inherent spectral change.
Morrison, G.S. (2009). Language & Speech, 52, 437–462.
doi:10.1177/0023830909336583



  • supplementary material


Perception of synthetic vowels by monolingual Canadian-English, Mexican-Spanish, and Peninsular-Spanish listeners.
Morrison, G.S. (2008). Canadian Acoustics, 36(4), 17–23.
http://jcaa.caa-aca.ca/index.php/jcaa/article/view/2100


L1-Spanish speakers’ acquisition of the English /i/–/I/ contrast: Duration-based perception is not the initial developmental stage.
Morrison, G.S. (2008). Language & Speech, 51, 285–315.
doi:10.1177/0023830908099067



  • supplementary material


Complexity of acoustic-production-based models of speech perception.
Morrison, G.S. (2008). Proceedings of Acoustics’08, (pp. 2369–2374). Paris: Société Française d’Acoustique.


Comment on “A geometric representation of spectral and temporal vowel features: Quantification of vowel overlap in three linguistic varieties” [J. Acoust Soc. Am. 119, 2334–2350 (2006)] (L).
Morrison, G.S. (2008). Journal of the Acoustical Society of America. 123, 37–40.
doi:10.1121/1.2804633

  • prepublication version including footnotes which were removed from the final version because of space constraints

  • Matlab function

  • Matlab function also available at American Institute of Physics Electronic Physics Auxiliary Publication Service (EPAPS): E-JASMAN-123-001801

  • The following article may also be of interest:
    Gorshi, S., Vaseghi, S., & Yan, Q. (2008) Cross-entropic comparison of formants of British, Australian and American English accents. Speech Communication, 50, 564–579. doi:10.1016/j.specom.2008.03.013


Logistic regression modelling for first- and second- language perception data.
Morrison, G.S. (2007). In M. J. Solé, P. Prieto, & J. Mascaró (Eds.), Segmental and prosodic issues in Romance phonology (pp. 219–236). Amsterdam: John Benjamins.

A multinomial logistic regression function is now avaialble in the Matlab Statistics Toolbox. I have provided versions of some of the sample software making use this function. T. M. Nearey’s software allows for more control over the specification of the logistic regression model, in particular it allows one to specify diphone-biassed models. Matlab is required to run the software. Zipped files which include Nearey's software are password protected. Contact me to get the password. See also Logistic regression Software above.


A cross-dialect comparison of Peninsula- and Peruvian-Spanish vowels.
Morrison, G.S., & Escudero, P. (2007). Proceedings of the 16th International Congress of Phonetic Sciences: Saarbrücken 2007.


Testing theories of vowel inherent spectral change.
Morrison, G.S., & Nearey, T.M. (2007). Journal of the Acoustical Society of America, 122, EL15–EL22.
doi:10.1121/1.2739111


L1 & L2 production and perception of English and Spanish vowels: A statistical modelling approach.
Morrison, G.S. (2006). Doctoral dissertation, University of Alberta, Edmonton, Alberta, Canada.
Stable URL: http://geoff-morrison.net/#_2006PhD


A cross-language vowel normalisation procedure.
Morrison, G.S., & Nearey, T.M. (2006). Canadian Acoustics 34(3), 94–95.
[Proceedings of the Canadian Acoustical Association Conference 2006, Halifax, Nova Scotia, Canada]


An adaptive sampling procedure for speech perception experiments.
Morrison, G.S. (2006). In Proceedings of the Ninth International Conference on Spoken Language Processing: Interspeech 2006 — ICSLP, Pittsburgh, Pennsylvania, USA (pp. 857-860). Bonn, Germany: ISCA.


Methodological issues in L2 perception research, and vowel spectral cues in Spanish listeners’ perception of word-final /t/ and /d/ in Spanish.
Morrison, G.S. (2006). In M. Diaz-Campos (Ed.), Selected Proceedings of the 2nd Conference on Laboratory Approaches to Spanish Phonetics and Phonology (pp. 35–47). Somerville, MA: Cascadilla Proceedings Project.


An appropriate metric for cue weighting in L2 speech perception: Response to Escudero & Boersma (2004).
Morrison, G.S. (2005). Studies in Second Language Acquisition, 27, 597–606.


Dat is what the PM said: A quantitative analysis of Prime Minister Chrétien’s pronunciation of English voiced dental fricatives.
Morrison, G.S. (2005). Cahiers linguistiques d’Ottawa, 33, 1–21. Ottawa, Ontario: University of Ottawa, Department of Linguistics.


[Review of Phonetically based phonology by B. Hayes, R. Kirchner, & D. Steriade (Eds.)].
Morrison, G.S. (2005). Linguist List, 16, 1400.


Principles for a quantitative speech learning model.
Morrison, G.S. (2005, November). Poster presented at the Workshop on Models of L1 and L2 Phonetics/Phonology, Utrecht, The Netherlands.


Towards a Quantitative Speech Learning Model.
Morrison, G.S. (2005, May). Poster presented at the 1st ASA Workshop on Second Language Speech Learning, Vancouver, British Columbia, Canada.


An acoustic and statistical analysis of Spanish mid-vowel allophones.
Morrison, G.S. (2004). Estudios de Fonética Experimental, 13, 11–37.


Perception and production of Spanish vowels by English speakers.
Morrison, G.S. (2003). In M. J. Solé, D. Recansens, & J Romero (Eds.), Proceedings of the 15th International Congress of Phonetic Sciences: Barcelona 2003 (pp. 1533–1536). Adelaide, South Australia: Causal Productions.


Spanish listeners’ use of vowel spectral properties as cues to post-vocalic consonant voicing in English.
Morrison, G.S. (2002). In Collected Papers of the First Pan-American/Iberian Meeting on Acoustics. Mexico, DF: Mexican Institute of Acoustics.


Effects of L1 duration experience on Japanese and Spanish listeners’ perception of English high front vowels.
Morrison, G.S. (2002). Master’s thesis, Simon Fraser University, Burnaby, British Columbia, Canada.
Stable URL: http://geoff-morrison.net/#_2002MA


Perception of English /i/ and /I/ by Japanese & Spanish listeners: Longitudinal results.
Morrison, G.S. (2002). In G.S. Morrison, & L. Zsoldos (Eds.), Proceedings of the North West Linguistics Conference 2002 (pp. 29–48). Burnaby, BC: Simon Fraser University Linguistics Graduate Student Association.


Japanese listeners’ use of duration cues in the identification of English high front vowels.
Morrison, G.S. (2002). In J. Larson, & M. Paster (Eds.), Proceedings of the 28th Annual Meeting of the Berkeley Linguistics Society (pp. 189–200). Berkeley, CA: Berkeley Linguistics Society.

  • The thesis and two papers above use discriminant analysis to model perception data, a more appropriate technique would be logistic regression.


Perception of English /i/ and /I/ by Japanese listeners.
Morrison, G.S. (2002). In S. Oh, N. Sawai, K. Shiobara, & R. Wojak (Eds.), University of British Columbia Working Papers in Linguistics Volume 8: Proceedings of NWLC 2001: Northwest Linguistics Conference (pp. 113-131). Vancouver, BC: University of British Columbia, Department of Linguistics. 


[Review of The sounds of language: An introduction to phonetics by H. Rogers].
Morrison, G.S. (2001, June). TEAL News, 23-25, 28.


Databases
&
Software


Links to software associated with particular papers are located alongside the refererences to those papers.

If you use my software for research please let me know and give me credit in published papers.


Forensic database of voice recordings of 500+ Australian English speakers.
Morrison, G. S., Zhang, C., Enzinger, E., Ochoa, F., Bleach, D., Johnson, M., Folkes, B. K., De Souza, S., Cummins, N., & Chow, D. (2015).


Forensic database of audio recordings of 68 female speakers of Standard Chinese.
Zhang, C., & Morrison, G.S. (2011).


Presentation timer
Matlab code providing countdown in minutes and seconds of presentation period and question period. [Software release 2012-12-02]
Stable URL: http://geoff-morrison.net/#Timer


Credible interval calculation
Stable URL: http://geoff-morrison.net/#CredInt


Sound file cutter upper.
Morrison, G.S. (2010). [Software release 2010-12-02]
Stable URL: http://geoff-morrison.net/#CutUp


train_llr_fusion_robust.m
Morrion, G.S. [Software release 2009-07-02]
Stable URL: http://geoff-morrison.net/#TrainFus

Robust version of train_llr_fusion.m from Niko Brümmer’s FoCal Toolbox. This version can handle cases of complete separation.


Logistic regression software for speech percepton data.
Morrison, G.S. (2009). [Software release 2009-03-13].
Stable URL: http://geoff-morrison.net/#LogReg2009

Includes data to run analyses from Morrison & Kondaurova (2009).


FormantMeasurer: Software for efficient human-supervised measurement of formant trajectories.
Morrison, G.S., & Nearey, T.M. (2011). [Software release 2011-05-26].
Stable URL: http://geoff-morrison.net/#FrmMes


SoundLabeller: Ergonomically designed software for marking and labelling portions of sound files.
Morrison, G.S. (2012). [Software release 2012-07-30].
Stable URL: http://geoff-morrison.net/#SndLbl


Acoustic recording software for speech production experiments.
Morrison, G.S. (2008). [Software release 2008-12-23].
Stable URL: http://geoff-morrison.net/#RecSft


Matlab function which draws Tippett plots.
Morrison, G.S. (2008, 2009). [Software release 2009-11-18].
Stable URL: http://geoff-morrison.net/#TipPlt


Matlab implementation of Aitken & Lucy’s (2004) forensic likelihood-ratio software using multivariate-kernel-density estimation.
Morrison, G.S. (2007). [Software].
Stable URL: http://geoff-morrison.net/#MVKD



Popular
Press


Quando l’intercettazione è ambigua
Catanzaro, M., Hummel, P., Tola E., & Viciano, A. (2016, April 13). Le Inchieste - La Repubblica.

Forensic frontiers: Whose voice is that?
Rogers, N. (2016, March 11). Science, Vol. 351, Issue 6278, pp. 1140.
doi:10.1126/science.351.6278.1140

Speech forensics: When Hollywood seldom mirrors real-life court cases
Catanzaro, M., Viciano, A., Hummel, P., & Tola E. (2015, December 16). Euro Scientist.


Congresso de Criminalística vai até quinta-feira, em Búzios
Herrera, R., & Quintão, R. (2015, November 9). RJTV 1ª Edição. TV Globo Rio de Janeiro. Television news report.


¿Qué hay en una voz? / ¿Què hi ha en una veu?
Catanzaro, M., Viciano, A., Hummel, P., & Tola E. (2015, November 8). Dominical (Sunday magazine of the newspaper El Periódico).


Real-life CSI: finding a voice in a haystack: New forensic method identifies voices to help nab criminals
Stirling, B. (2015, November 2). New Trail.


Audio expert doubts Tory expert’s analysis

Bryden, J. (2014-12-01) The Canadian Press.


A revolution in forensic voice comparison / Una revolución en la comparación forense del habla.
Morrison, G.S. (2010, November). 2nd Pan-American/Iberian Meeting on Acoustics Lay Language Papers, Acoustical Society of America World Wide Press Room.


Sounds & Signals: Improving forensic voice comparison. (Podcast report based on an interview with Dr. Geoffrey Stewart Morrison).
Bard, S. (2009, June 19). Science Update. Washington, DC: American Association for the Advancement of Science.

Report begins at time stamp 9:17


Forensic voice comparison – Reality not TV.
Morrison, G.S. (2009, May). 157th Meeting Lay Language Papers, Acoustical Society of America World Wide Press Room.



Other


Teaching the classical Hebrew stem system: The binyanim
Morrison, G.S. (1995). Master’s thesis, Vancouver School of Theology, Vancouver, BC, Canada.
Stable URL: http://geoff-morrison.net/#_1995MTS




Research
Projects

Making demonstrably valid and reliable forensic voice comparison a practical everyday reality in Australia
ARC Linkage Project 2010–2013.
Researchers: Geoffrey Stewart Morrison (Lead Investigator), Julien Epps, Eliathamby Ambikairajah, Gary Edmond, Joaquín González-Rodríguez, Daniel Ramos, Cuiling Zhang
Partner Organisations: Australian Federal Police, New South Wales Police, Queensland Police, National Institute of Forensic Science, Australasian Speech Science and Technology Association;,Universidad Autónoma de Madrid,Guardia Civil
Consultants: Philip Rose, Claude Roux

Incorporation of forensic analysis techniques as part of an automatic speaker recognition system
United States Government, Office of the Director of National Intelligence (ONDI), Intelligence Advanced Research Projects Activity (IARPA), through the Army Research Laboratory (ARL), Subcontract through IBM Thomas J. Watson Research Center 2010–2011.
Principal Investigator at IBM: Jason W. Pelecanos
Other IBM researches: Mohamed Omar, Weizhong Zhu, Sibel Yaman, Kyu Han
Principal Investigator at UNSW: Geoffrey Stewart Morrison
Other UNSW researchers: Cuiling Zhang, Felipe Ochoa, Ewald Enzinger, Tharmarajah Thiruvaran

Individual voice quality in the identification of speakers
Spanish Ministry of Science and Innovation National Programme for Fundamental Research Projects 2010–2013.
Researchers: Juana Gil Fernández (Lead Investigator), Secundino Fernández González, María José Albalá Hernández, José Antonio Hierro, Geoffrey Stewart Morrison, Jorge Rico Ródenas, Eugenia San Segundo

Forensic comparison of Chinese female voices
International Association for Forensic Phonetics and Acoustics Research Grant 2010.
Researchers: Cuiling Zhang, Geoffrey Stewart Morrison



Teaching







Monte Igeldo, Donostia, Basque Country

Lord Howe Island, New South Wales, Australia

Prague, Czech Republic


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Page last updated 25 June 2016










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