The perception of non-native phonological categories in adult-directed and infant-directed speech: An experimental study. Accepted at 50th Annual Meeting of the Societas Linguistica Europaea (SLE 2017), 10-13.09.2017, University of Zurich, Switzerland.

Timing patterns variability in Latgalian read speech. In: Wim van Dommelen, Jacques Koreman (Eds.) Nordic Prosody XII. Peter Lang. (Klessa, K., Nau, N., Orlovs, O., in press).


Analiza wybranych cech zmienności iloczasowej w różnych stylach wypowiedzi na podstawie korpusów nagrań dla technologii mowy. Prace Filologiczne, vol. LXIX, str. 215-235 (Klessa, K., in press).

Dokumentacja języków [w:] Języki w niebezpieczeństwie: księga wiedzy, Nau. N, Hornsby, M., Karpiński, M., Klessa, K., Wicherkiewicz, T., Wójtowicz, R. (Eds.), Wydział Neofilologii UAM, Poznań, ISBN 978-83-947198-4-5. Download or read on-line.

Speech Annotation Mining with Annotation Pro plugins, Wydawnictwo Rys, Poznań. ISBN 978-83-65483-20-1. (Klessa, K.)

Annotation Pro. Enhancing analyses of linguistic and paralinguistic features in speech, Wydział Neofilologii UAM, Poznań. ISBN 978-83-946017-0-6. (Klessa, K.) Download.

Polish rhythmic database – new resources for speech timing and rhythm analysis. Forthcoming in: Proceedings of 10th International Conference on Language Resources and Evaluation (LREC). 23-28 May 2016, Portorož, Slovenia (Wagner, A., Klessa, K., Bachan, J.). Download paper.


The Phonetician

The Phonetician. A publication of the International Society of Phonetic Sciences . No. 111-112. Katarzyna Klessa & Brigitte Bigi (Guest Editors)

A syllable-based analysis of speech temporal organization: a comparison between speaking styles in dysarthric and healthy populations. Proceedings of INTERSPEECH 2015, Dresden, Germany (Bigi, B., Klessa, K., Georgeton, L. and Meunier, Ch.) Download paper

Automatic syllabification of Polish.  In: Vetulani Z., Mariani J. (Eds): Proceedings of the 7th Language & Technology Conference (Bigi, B., Klessa, K.)

Using TypeCraft and Annotation Pro for multilayer annotation and analysis of Tense and Aspect in Krio. In: Vetulani Z., Mariani J. (Eds): Proceedings of the 7th Language & Technology Conference (Beermann D., Klessa K., Nyampong B.O.)

Consistency of Prosodic Annotation of Spontaneous Speech for Technology Needs.  In: Vetulani Z., Mariani J. (Eds): Proceedings of the7th Language & Technology Conference (Bachan J., Wagner A., Klessa K., Demenko G.)

Przegląd wybranych aspektów analizy prozodii mowy spontanicznej na potrzeby technologii mowy. Prace filologiczne, vol. LXVI/2015, str. 271-298 (Wagner, A., Bachan, J., Klessa, K., Demenko, G.).

Prosody and gesture in dialogue: Cross-modal interactions. Proceedings of 4th Gesture and Speech in Interaction (GESPIN) Conference, Nantes, France (Czoska, A., Klessa, K., Karpiński, M., Nowikow-Jarmołowicz, E.).

Perception of Polish Neutral and Affective Speech by Native and Non-native Listeners, Proceedings of The 18th International Congress of Phonetic Sciences, Glasgow, UK. (Klessa, K., Oleśkowicz-Popiel, M., Owsianny, M.) Download link.

Polish Infant Directed vs. Adult Directed Speech: Selected Acoustic-Phonetic Differences, Proceedings of The 18th International Congress of Phonetic Sciences, Glasgow, UK. (Czoska, A., Klessa, K., Karpiński, M.) Download link.

The influence of tempo and speaking style on timing patterns in Polish. Proceedings of 6th International Conference of Experimental Linguistics (ExLing), Athens, Greece (Wagner, A. Klessa, K.)

Annotation Pro. Új eszköz a beszéd nyelvi és paranyelvi sajátosságainak címkézésre és elemzésére, Beszédkutatás (Speech Research Journal). Research Institute for Linguistics of the Hungarian Academy of Sciences. Budapest (Klessa, K. Markó A.) Download PDF of the journal issue.

Design and Implementation of an On-line Database for Endangered Languages: Multilingual Legacy of Poland. In: Input a Word, Analyse the World: Selected Approaches to Corpus Linguistics. Francisco Alonso Almeida, Ivalla Ortega Barrera, Elena Quintana Toledo and Margarita Sánchez Cuervo (Eds.), Newcastle upon Tyne: Cambridge Scholars Publishing, ISBN (10) 1-4438-8513-4. (Klessa, K., Wicherkiewicz, T.).

Prozodia niepewności.  In: Sens i brzmienie, Danielewiczowa M., Bilińska J., Doboszyńska-Markiewicz K., Zaucha J. (Eds.), Wydawnictwo Uniwersytetu Kardynała Stefana Wyszyńskiego, Warszawa, Preprint version (in Polish) available for download at (Karpiński, M., Klessa, K.).

Klessa, K., Bigi, B (Eds.) (2015). The Phonetician. A publication of ISPhS/International Society of Phonetic Sciences, nr 111-112, 2015/I-II (

A blog paper at Open Science web service by De Gruyter Open:

Open access data and open educational resources help to save endangered languages. Open Science: Your guide to Open Access, available at: (Klessa, K., Wicherkiewicz, T.).


Annotation Pro + TGA: automation of speech timing analysis, Proceedings of the 9th Language Resources and Evaluation Conference, Reykjavik, Iceland. ISBN 978-2-9517408-8-4 (Klessa, K. and Gibbon, D.). Download paper. – including multimedia language resources to disseminate knowledge and create educational material on less-resourced languages, Proceedings of the 9th Language Resources and Evaluation Conference, Reykjavik, Iceland. ISBN 978-2-9517408-8-4 (Jung, D., Klessa, K., Duray, Z., Oszkó, B., Sipos, M., Szeverényi, S., Várnai, Z., Trilsbeek, P. & Váradi, T.). Download paper.

Computational annotation-mining of syllable durations in speech varieties, Proceedings of the 7th Speech Prosody Conference, 20-23 May 2014, Dublin, Ireland. ISSN: 2333-2042 (Yu, J., Gibbon, D., Klessa, K.) Download paper.

Local and global convergence in the temporal domain in Polish task-oriented dialogue, Proceedings of the 7th Speech Prosody Conference, 20-23 May 2014, Dublin, Ireland. ISSN: 2333-2042 (Karpiński, M., Klessa, K., Czoska, A.) Download paper.

Compilation of Language Resources and On-line Dissemination of Knowledge about Endangered Languages and Linguistic Heritage. Proceedings of The Sixth Baltic Conference Human Language Technologies (HLT) – the Baltic Perspective. Kaunas, Lithuania, 26-27 September 2014, pp. 192-195 (Klessa, K., Nau, N.). Go to download page.

Duration and speed of speech events: a selection of methods. In: Lingua Posnaniensis 2014(1), Special Issue in Honour of Prof. Piotra Łobacz, pp. 59-84, DOI: 10.2478/linpo-2014-0004, (Gibbon, D., Klessa, K., Bachan, J.) Download page, download link.

Book of Knowledge of Languages in Danger. EN:  (website publications in Polish and in English:, PL: (Nau, N., Hornsby, M., Karpiński M., Klessa, K., Wicherkiewicz, T., Wójtowicz, R. (Eds.)).

Language documentation. In Nau, N., Hornsby, M., Karpiński M., Klessa, K., Wicherkiewicz, T., Wójtowicz, R. (Eds.): Book of Knowledge of Languages in Danger. (website publication: (Klessa, K.)


Annotation Pro – a new software tool for annotation of linguistic and paralinguistic features In Brigitte Bigi and Daniel Hirst (Eds.), Proceedings of TRASP (Tools and Resources for the Analysis of Speech Prosody, a satellite event for Interspeech 2013). Aix-en-Provence, 30 August, 2013. ISBN: 978-2-7466-6443-2 (Klessa, K., Karpiński, M., Wagner, A.) Download site

Annotation Pro Software. Presentation (with demo) at INNET Summer School on Technological Approaches to the Documentation of Lesser Used Languages Gniezno, 1-14 September 2013 r. (Klessa, K.) Download site

“Paralingua” – a new speech corpus for the studies of paralinguistic features In Chelo Vargas-Sierra (Ed.) Corpus Resources for Descriptive and Applied Studies. Current Challenges and Future Directions: Selected Papers from the 5th International Conference on Corpus Linguistics (CILC2013). Procedia – Social and Behavioral Science. Volume 95. pp. 48-58. Elsevier ISSN: 1877-0428 (Klessa, K., Wagner, A., Oleśkowicz-Popiel, M., Karpiński, M.) Download site

Annotation of paralinguistic features for the needs of speaker characterisation In Eva Liina Asu, Pärtel Lippus (Eds.) Proceedings of Nordic Prosody XI Conference, Tartu, Estonia 15-17 August 2012, pp. 187-196 (Klessa, K)


Polish segmental duration: selected observations based on corpus data [in:] Speech and Language Technology, Special Issue dedicated to Wiktor Jassem, pp. 95-104 (2011/2012), Gibbon, Dafydd, Hirst, Daniel, Campbell Nick (Eds.), Poznan, PTFon, pp. 94-104. (Klessa, K.)

Annotating paralinguistic features in quasi-spontaneous speech. Adding the “vision” component? [in:] Proceedings of Workshop on Vision and Language, December 13th and 14th, 2012, University of Sheffield, UK (Klessa, K., Karpiński, M.).

Using “Paralingua” database for investigation of affective states and paralinguistic features [in:] Speech and Language Technology, vol. 14/15 (2011/2012), Demenko, G., Wagner, A. (Eds.), Poznan, PTFon, pp. 71-91. (Klessa, K., Wagner, A., Oleśkowicz-Popiel, M.)

Development of Large Vocabulary Continuous Speech Recognition for Polish. [in:] Acta Physica Polonica A, pp. 86-91. (Demenko, G., Szymański, M., Cecko, R., Kuśmierek, E., Lange, M., Wegner, K., Klessa, K., Owsianny, M.) PDF


Optimization of unit selection speech synthesis. Proceedings of XVIIth International Congress of Phonetic Sciences, Hong Kong. (Szymański M., Klessa K., Breuer S. Demenko G.) PDF

Development of large vocabulary continuous speech recognition using phonetically structured speech corpus. Proceedings of XVIIth International Congress of Phonetic Sciences, Hong Kong. (Demenko, G., Szymański, M., Cecko, R., Lange, M., Klessa, K. and Owsianny, M.) PDF


Speechlabs ASR. Polish Lexical Database for Speech Technology: Design and Architecture. [in:] Speech and Language Technology, vol 12/13, pp. 191-207 (2009/2010). (Klessa, K., Karpiński, M., Bałdys, O., Demenko, G.)

Implementation of Polish speech synthesis for the BOSS system. Bulletin of the Polish Academy of Sciences. Technical Sciences, Vol. 58, No. 3, 2010, pp. 371-376. (G. Demenko, B. Moebius, and K. Klessa)

Polish unit selection speech synthesis with BOSS: extensions and speech corpora. [in:] International Journal of Speech Technology: Volume 13, Issue 2 (2010), Page 85. (G. Demenko, K. Klessa, M. Szymański, S. Breuer, W. Hess)

F0 contour and segmental duration modeling using prosodic features. Proceedings of Speech Prosody Conference. 2010, Chicago. (A. Wagner, K. Klessa). PDF


Development of Polish Large Vocabulary Continuous Speech Recognition (LVCSR) acoustic models (PL: Opracowanie modeli akustycznych na potrzeby systemu rozpoznawania mowy ciągłej z zastosowaniem dużych leksykalnych baz danych). Proceedings of i3 Conference: Internet-Infrastructures-Innovations. Polish Academy of Sciences. 2009. (G. Demenko, S. Grocholewski, K. Klessa, M. Lange, B. Rapp, M. Szymański) see slides

Structure and Annotation of Polish LVCSR Speech Database. Proceedings of Interspeech Conference 2009, September 6-10 2009, Brighton, UK. (K. Klessa, G. Demenko) Download PDF


First evaluation of Polish LVCSR acoustic models obtained from the JURISDIC database. Speech and Language Technology, 2008, vol. 11. (M. Szymański, J. Ogórkiewicz, M. Lange, K. Klessa, S. Grocholewski, G. Demenko)

The design of Polish Speech Corpus for Unit Selection Speech Synthesis. Speech and Language Technology, 2008, vol. 11. (G. Demenko, B. Möbius, K. Klessa)

An Investigation into the intra- and inter-labeler agreement in the JURISDIC database. Speech and Language Technology, 2008, vol. 11 (K. Klessa, J. Bachan).

LVCSR speech database-JURISDIC. In Signal Processing Algorithms, Architectures, Arrangements, and Applications (SPA), 2008, pp. 67-72. IEEE, 2008 (Demenko, Grażyna, Stefan Grocholewski, Katarzyna Klessa, Jerzy Ogórkiewicz, Agnieszka Wagner, Marek Lange, Daniel Śledziński, and Natalia Cylwik).

Development and Evaluation of Polish Speech Corpus for Unit Selection Speech Synthesis Systems. Proceedings of Interspeech 2008, September 22-26, 2008, Brisbane, Australia. (Demenko G., Bachan, J., Möbius, B., Klessa, K., Szymański, M., Grocholewski, S.).

Jurisdic – Polish Speech Database for taking dictation of legal texts Proceedings of LREC Conference, Marrakech, Morocco, 2008. (G. Demenko, S. Grocholewski, K. Klessa, A. Wagner, J. Ogórkiewicz, M. Lange, D. Śledziński, N. Cylwik). PDF

A Preliminary Study of Temporal Adaptation in Polish VC Groups. Proceedings of Speech Prosody Conference, Campinas, Brasil, 2008. (Malisz, Z., Klessa, K.).


Optimization of Polish Segmental Duration Prediction with CART, Sixth ISCA Workshop on Speech Synthesis (SSW6), Bonn, 2007. (K. Klessa, M. Szymański, S. Breuer, G. Demenko). PDF

The design of Polish Speech Corpora for expressive speech synthesis in BOSS system, PPEE Conference 2007. (G. Demenko, K. Klessa, M. Szymański, Jolanta Bachan).

A Study of Chosen Temporal Relations within Syllable Structure in Polish, First presented at SSAPS Conference in autumn 2006, Poznań, published in 2007 in Speech and Language Technology, vol. . ( K. Klessa, Daniel Śledziński). Download paper.


Analysis of Polish Segmental Duration with CART, Proceedings of Speech Prosody Conference, Dresden, (S. Breuer, K. Francuzik (Klessa), G. Demenko) 2006. PDF


Nuclear Melody in Polish Semi-spontaneous and Read Speech; Evidence from the Polish Intonational Database PoInt. Studia Phonetica Posnaniensia, 97–128. (Francuzik, K., Karpiński, M., Kleśta, J., Szalkowska, E.)


Identification of Nuclear Melody Placement in Polish Read Texts, Proceedings of Prosodic Interfaces, Nantes (Baranowska, E., Francuzik (Klessa), K., Karpiński, M., Kleśta, J.).

Parametryzacja zbioru danych dotyczących iloczasu głoskowego na potrzeby syntezy mowy, Speech and Language Technology, vol. 7, Poznań, (K. Francuzik (Klessa)).

Interphrase Pause Realization Rules for the Purpose of High Quality Polish Speech Synthesis, Proceedings of SASR, Szczyrk (Karpiński, M., Kleśta, J., Baranowska, E., Francuzik (Klessa), K).

Klasyfikacja samogłosek polskich za pomocą sieci neuronowych w wymowie dzieci niesłyszących. (Classification of Polish Vowels Using Neural Networks). Audiofonologia (t. XXIII/2003) (Łobacz, P., Grygiel, W., Baranowska, E., Francuzik (Klessa), K.).

Determining boundaries in written texts for the purpose of Polish speech synthesis, [w:] Demenko, G., Karpiński, M. (Red.) Speech and Language Technology, vol. 7 (2003), Wyd. PTFon, 71 78(Baranowska, E., Francuzik (Klessa), K., Karpiński, M., Kleśta, J.).


A Preliminary Study of the Intonational Phrase, Nuclear Melody and Pauses in Polish Semi-Spontaneous Narration. Speech Prosody Proceedings, Aix-en-Province, 2002. (K. Francuzik (Klessa), M. Karpiński, J. Kleśta) Download paper.

Acoustic-phonetic description of Polish vowels: teen-age deaf speech, Psychology of Language and Communication t. 6, zesz.2. (P. Łobacz, K. Francuzik (Klessa), E. Szalkowska).

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