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Curriculum Vitae

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Contents

Personal Information

Born in 1974.

Place of residence: Espoo, Finland

Phone +358 50 484 0973

E-mail mairas@iki.fi

Education

2003 - 2008, Helsinki University of Technology

Dr. Tech (EE)

Topic of dissertation: Methods and Studies of Laryngeal Voice Quality Analysis in Speech Production

  • Department of Electrical and Communications Engineering
  • Major: Acoustics and Audio Signal Processing
  • Minor: Psychology (at University of Helsinki)

1993 - 2002, Helsinki University of Technology

M.Sc.(EE)

  • Department of Electrical and Communications Engineering
  • Major: Acoustics and Audio Signal Processing
  • Minor: Interactive Digital Media


Linguistic Abilities

  • Finnish (mother tongue)
  • English (fluent)
  • Swedish (good)
  • German (basics).

Work Experience

6/2008 -, Nokia Corporation

Senior specialist

  • Software architect for the Python Runtime project
  • Python architecture maintainer in MeeGo Computers
  • Technical Product Owner for the Python Runtime project

1/2003 - 5/2008, Helsinki University of Technology / Laboratory of Acoustics and Audio Signal Processing

Researcher

  • Research topic: Laryngeal voice quality analysis methods and studies in speech production
  • Doctoral defence: 5/2008

10/2007 -, Kuuasema Oy

Part-time consultant

  • Server environment overhaul, virtual server setup and administration

4/2004 -, Neomusic Oy

Part-time consultant

  • Linux system administration

3/2002 - 12/2002, Tmi Matti Airas

Self-employed

  • Various system administration, software design and consulting tasks.

8/2001 - 3/2002, Innofactor Ltd

IT Specialist

  • Design and implementation of specialized cost-effective highly-available Linux servers for firewalling, NTP and name services.
  • Implementation of interfacing software using Perl, featuring parser-based user interface and backend communications using SOAP.

11/1999 - 8/2001, Oy Elmorex Ltd

R&D Engineer

  • Development of a mobile and web service using C, perl and SQL. I was responsible for designing and implementing the service framework, and for large part implemented the audio signal processing part of the application as well. Furthermore, I participated in the business and marketing decisions and business negotiations concerning the service. The service is now being sold by Elmorex Ltd to portals and operators around Europe.
  • System administration in company network.

11/1999 - 4/2000, Helsinki University

Research assistant, part time

  • Design and implementation of a fetus sound stimulator for use by Helsinki Brain Research Centre in Biomag MEG facility.

6/1998 - 10/1999, Mimedia Productions Ltd

WWW Applications programmer, part-time

  • Development of various WWW applications using perl, mod_perl and SQL. Some of these applications were successfully used in a high-profile, high-traffic portal.

2/1998 - 10/1999, Helsinki University of Technology / Acoustics Laboratory

Research Assistant

  • Development and implementation of tube sound stimulators to be used with MRI-equipment of Kuopio University Hospital and in Helsinki University Central Hospital / Biomag.
  • Research and implementation of microphone arrays.
  • Part-time IT systems administration in a heterogenous computing environment (Linux servers, Win9x/NT/Linux/IRIX/MacOS clients)

10/1997 - 4/1998, Balance Consulting Oy

Software developer, part-time

  • Microsoft Access software development

10/1996 - 10/1997, Student Union of HUT

Civilian Service as an IT Support Person

  • Administration of a Windows NT based computer environment with various Windows PCs and Macintoshes as client computers
  • Development of computer systems and programs, including programming in Microsoft Access, Perl and HTML
  • Assisting of the PR group of the Student Union in preparing the student union magazine.

1996 Summer, Esmerk Information

IT Support Person

  • Administration and further development of functions
  • Further development of Internet connections of the company
  • Development of Visual Basic software
  • Design and implementation of a large Microsoft Access based DB software

1996 Summer and Autumn, part-time, JK Tuote Lanser

DSP Software Designer

  • Programming in Motorola DSP56k assembler in a joint project with HUT Acoustics laboratory.

1990-92 Part-time and summer jobs, 1995 Summer, Optiplan/Opti Inter-Consult Oy

IT Support Person

  • Co-operating in administration and development of functions in a mixed Windows and UNIX environment
  • Designing web pages for the company

1993 Summer, Tmi Holocom

Own business name

  • Various programming tasks in C++, including DB application development.

Courses and Certifications

  • Certified Scrum Product Owner (Nov 11, 2010)

Interests and activities

  • Sailing: I currently own a wooden sailing boat
  • Photography
  • Making stuff: DIY, woodworking, electronics
  • Cartography
  • Economics
  • "Green" issues

List of Publications

International Journal Papers

  1. Matti Airas. HUT Aparat: An environment for voice inverse filtering and parameterization. Logopedics Phoniatrics Vocology, 2008. Accepted for publication.
  2. Laura Lehto, Matti Airas, Eva Björkner, Johan Sundberg, and Paavo Alku. Comparison of two inverse filtering methods in parameterization of the glottal closing phase characteristics in different phonation types. Journal of Voice, 21(2):138-150, 2007.
  3. Matti Airas and Paavo Alku. Emotions in vowel segments of continuous speech: Analysis of the glottal flow using the normalized amplitude quotient. Phonetica, 63(1):26-46, March 2006.
  4. Paavo Alku, Brad Story, and Matti Airas. Estimation of the voice source from speech pressure signals: Evaluation of an inverse filtering technique using physical modelling of voice production. Folia Phoniatrica et Logopaedica, 58(2):102-113, 2006.
  5. Juhani Toivanen, Teija Waaramaa, Paavo Alku, Anne-Maria Laukkanen, Tapio Seppänen, Eero Väyrynen, and Matti Airas. Emotions in [a:]: A Perceptual and Acoustic Study. Logopedics Phoniatrics Vocology, 31(1):43-48, 2006.
  6. Paavo Alku, Jaromir Horacek, Matti Airas, Francois Griffond-Boitier, and Anne-Maria Laukkanen. Performance of glottal inverse filtering as tested by aeroelastic modelling of phonation and fe modelling of vocal tract. Acta Acustica united with Acustica, 92(5):717-724, 2006.
  7. Paavo Alku, Matti Airas, Eva Björkner, and Johan Sundberg. An amplitude quotient based method to analyze changes in the shape of the glottal pulse in the regulation of vocal intensity. Journal of the Acoustical Society of America, 120(2):1052-1062, 2006.
  8. Paavo Alku, Matti Airas, Tom Bäckström, and Hannu Pulakka. Using group delay function to assess glottal flows estimated by inverse filtering. Electronics Letters, 41(9):562-563, 2005.

International Conference Papers

  1. Martti Vainio, Matti Airas, Juhani Järvikivi, and Paavo Alku. Laryngeal Voice Quality in the Expression of Focus. In Proceedings of Interspeech 2010, Makuhari, Japan, September 26--30, 2010.
  2. Matti Airas, Paavo Alku, and Martti Vainio. Laryngeal Voice Quality Changes in Expression of Prominence in Continuous Speech. In Proceedings of 5th International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications (Maveba 2007). Florence, Italy, December 13--15, 2007.
  3. Matti Airas and Paavo Alku. Comparison of Multiple Voice Source Parameters in Different Phonation Types. In Proceedings of Interspeech 2007, pages 1410--1413, Antwerpen, Belgium, August 27--31, 2007.
  4. Paavo Alku, Jaromir Horácek, Matti Airas, and Anne-Maria Laukkanen. Assessment of glottal inverse filtering by using aeroelastic modelling of phonation and fe modelling of vocal tract. In Proceedings of 4th International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications, Firenze, Italy, October 29-31 2005.
  5. Paavo Alku, Matti Airas, Tom Bäckström, and Hannu Pulakka. Group delay function as a means to assess quality of glottal inverse filtering. In the 9th European Conference on Speech Communication and Technology, pages 1053-1056, Lisbon, Portugal, September 4-8 2005.
  6. Matti Airas, Hannu Pulakka, Tom Bäckström, and Paavo Alku. A toolkit for voice inverse filtering and parametrisation. In the 9th European Conference on Speech Communication and Technology, pages 2145-2148, Lisbon, Portugal, September 4-8 2005.
  7. Tom Bäckström, Matti Airas, Laura Lehto, and Paavo Alku. Objective quality measures for glottal inverse filtering of speech pressure signals. In the IEEE International Conference on Acoustics, Speech and Signal Processing, volume 1, pages 897-900, Philadelphia, PA, USA, March 19-23 2005.
  8. Paavo Alku, Brad Story, and Matti Airas. Evaluation of an inverse filtering technique using physical modeling of voice production. In 8th International Conference on Spoken Language Processing, Jeju Island, Korea, October 4-8 2004. CD-ROM Proceedings.
  9. Matti Airas and Paavo Alku. Emotions in short vowel segments: Effects of the glottal flow as reflected by the normalized amplitude quotient. In Proceedings of Affective Dialogue Systems Workshop 04, pages 13-24, Kloster Irsee, Germany, June 2004.
  10. Perttu Hämäläinen, Teemu Mäki-Patola, Ville Pulkki, and Matti Airas. Musical computer games played by singing. In The 7th International Conference on Digital Audio Effects, pages 367-371, Naples, Italy, October 5-8 2004.
  11. Matti Airas, Antti Järvinen, and Esa Piirilä. Using tubephones for wideband auditory stimulation in brain research. In Proceedings of Forum Acusticum 99, Berlin, Germany, March 1999.

Other publications

  1. Matti Airas and Paavo Alku. Emootioiden vaikutus äänilähteen naq-parametriin lyhyissä vokaalisegmenteissä. In Fonetiikan päivät 2004, pages 40-43, Oulu, Finland, 2004.
  2. Matti Airas. Development of a Mobile Interactive Musical Service. Master's thesis, 2002.
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