Deputy Director and Research Scientist
Psychoacoustics and Experimental Audiology

Tel. +43 1 51581-2511
Email: piotr.majdak(at)

Scientific IDs:
ORCID (0000-0003-1511-6164), Scopus, Research Gate, Google Scholar

Academic background

After completing a technical school for electrical engineering, Piotr Majdak studied audio engineering at the University of Technology in Graz (TU-Graz) and at the University of Music and Dramatic Arts in Graz (KUG). During his studies, he  developed hardware and software for measurement tools and process-controlling devices.

Piotr Majdak graduated with the Master's thesis entitled "Implementation of a head related binaural technique", in which he dealt with a real-time binaural system called Ambisonics. In that project, Ambisonics allowed the inclusion of the listener’s head movements without the need for time-variant filtering, and therefore a reduction of the computational power. As part of the thesis, the binaural system was implemented for a digital signal processor platform including a head-tracker. The Master's thesis was done jointly with Markus Noisternig.

In 2002, he joined ARI as a junior researcher being involved in setting-up the group "Psychoacoustics and experimental audiology".

In 2008, he finished his PhD about sound lateralization in cochlear-implant listeners, in which the effects of different aspects of the interaural time differences on sound lateralization are described.

In 2015, his habilitation for the area "Acoustics and audio engineering" was approved, which allows him to supervise PhD students at the KUG.

Current research

General research field is spatial hearing, in particular:

  • Sound localization in normal-hearing, hearing-impaired, and cochlear-implant listeners;
  • Virtual acoustics;
  • Effects of head-related transfer functions (HRTFs) and its numerical simulation;
  • General binaural effects in electric hearing.

Piotr Majdak was the main developer of ExpSuite, an open-source software framework for psychoacoustic experiments in normal-hearing and cochlear-implant listeners, used at ARI since 2003 and now mainly developed by Michael Mihocic. Piotr Majdak is the main developer of the SOFA API and the Auditory Modeling Toolbox.

A list of projects in which Piotr participates or participated can be found here.



  • Goupell M.; Baumgartner W.D.; Laback B.; Majdak P. (2007) Effect of different frequency mappings on speech intelligibility for CI listeners. Fortschritte der Akustik. Stuttgart.
  • Laback B.; Majdak P. (2007) Effect of center frequency on the sensitivity to interaural time differences in filtered pulse trains. DAGA 2007 (DEGA, ed.).
  • Laback B.; Majdak P.; Baumgartner W.D. (2007) Lateralization discrimination of interaural time delays in four-pulse sequences in electric and acoustic hearing. J. Acoust. Soc. Am., S. 2182-2191.
  • Majdak P.; Laback B.; Baumgartner W.-D. (2006) Effects of interaural time differences in fine structure and envelope on lateral discrimination in electrical hearing. Journal of the Acoustical Society of America, Bd. 120, S. 2190-2201.
  • Laback B.; Majdak P.; Baumgartner W.D. (2005) Interaural Time Differences in Fine Structure, Onset, and Offset in Bilateral Electrical Hearing: Effects of Stimulus Duration. .
  • Laback B.; Majdak P.; Baumgartner W.D. (2005) Interaural Time Differences in Fine Structure and Envelope in Bilateral Electrical and Acoustical Hearing. .
  • Majdak P.; Laback B.; Baumgartner W.D. (2005) Interaural Time Differences in Temporal Fine Structure, Onset, and Offset in Bilateral Electrical Hearing. .

Additional Information

Additional Information


Piotr Majdak is responsible for ARI's experimental facilities. He is also in charge for ethical issues at the ARI. Since January 2016, he is the deputy director of the ARI.


He teaches "Algorithmen in Akustik und Computermusik" (algorithms in acoustic and computer music) at the Institute for Electronic Music and Acoustics, KUG in Graz. Since 2014, he also teaches "Audiotechnik" at the Fachhochschule Technikum Wien.

Professional societies and activities

Piotr Majdak is member of the ASA, AAA ,DEGA, ARO, and the president of the Austrian section of the AES.