zotter's Home Page

zotter

senior scientist

Tel.: ++43/316/389-3382
Fax: ++43/316/389-3171
E-mail: zotter__at__iem.at

If something's missing: also check the old page here.

interests & current work

I am chair of the TC "Virtuelle Akustik" within DEGA (co-chairs Prof. Stefan Weinzierl, Prof. Sascha Spors, Prof. Bernhard Seeber). Check out our open data, the Student 3D Audio Production Competition, the IEM Plugins, the OSIL project, the IKO, IEM loudspeaker cubes, and plenaudio walkthrough. There will be a huge 3D Audio System at the AES in Merano 2018 whose design we could support :)

My interests are:

  • compact spherical loudspeaker arrays (sound-radiation synthesis)
  • acoustic holography and holophony lecture(requires kunstuni-login)
  • vibration and radiation in the spherical sound field
  • surrounding spherical microphone arrays (sound-radiation capture/analysis)
  • surrounding spherical loudspeaker arrays (Ambisonics)
  • source-and-receiver-directional (SRD) room impulse responses (RIRs), 5D
  • variable-perspective recording and playback
  • perception of beamformed sounds
  • source widening algorithms

publications in 2019

  • Franz Zotter, Matthias Frank. Ambisonics - A Practical 3D Audio Theory for Recording, Studio Production, Sound Reinforcement, and Virtual Reality. SpringerOpen, June 2019.
  • Stefan Riedel, Franz Zotter, Robert Höldrich, "Design and Control of Mixed-Order Spherical Loudspeaker Arrays", ICMC, New York, June 2019.
  • Markus Zaunschirm, Franz Zotter, Matthias Frank, "Perceptual Evaluation of Variable-Orientation Binaural Room Impulse Response Rendering", AES IAA, York, May 2019.
  • Hyunkook Lee, Matthias Frank, Franz Zotter, "Spatial and Timbral Fidelities of Binaural Ambisonics Decoders for Main Microphone Array Recordings", AES IIA, York, May 2019.
  • Franz Zotter, Matthias Frank, "Reproducibility of stereophonic amplitude-panning curves", Fortschritte der Akustik - DAGA Rostock, March 2019.
  • Franck Zagala, Franz Zotter, "Idea for Sign-Change Retrieval in Magnitude Directivity Patterns ", Fortschritte der Akustik - DAGA Rostock, March 2019.

theses

  • Franz Zotter, "Analysis and Synthesis of Sound-Radiation with Spherical Arrays", Doctoral Thesis, Institute of Electronic Music and Acoustics, University of Music and Performing Arts Graz, [pdf] [pdf], 2009.
  • Diplomarbeit: "Unterdrückung hörbarer Störgeräusche in Echtzeitsystemen", [pdf], 2004.

teaching

Lecture on "5D" room impulse responses [zip:ppt]. ERASMUS-TA, ITA, RTWH-Aachen, Gradientenmikrofone hoher Ordnung, in Elektroakustik / akustische Messtechnik, [pdf], Jan., 2012. ERASMUS-TA, Fachgebiet Audiokommunikation, TU-Berlin, Virtuelle Akustik: Holografie mit dem Rayleighintegral, sphärische Holografie/Holofonie, Jun., 2012.
Acoustic Holography and Holophony (Lecture):
W1011, W1112, W1213, W1314, W1415, W1516(with video lectures), W1617
(now) Fundamentals of immersive 3D Audio Technology (Lecture):
W1718

Algorithms in Acoustics and Computer Music 2 (Lab/Seminar):
S08, W0809, W0910, W1011, W1112, W1213, W1314, W1516, W1617
Acoustic Holography and Holophony / Acoustic Measurement Techniques 2 (Lab):
S08, S09, S10, S11, S12, S13, S14, S15, S16, S17

advised students' works

Master/Diploma theses:

  • Franck Zagala, "Optimum-phase primal signal and radiation-filter modelling of musical instruments", M Thesis, 2019.
  • Patrick Ziegler, "Joint single-channel speech dereverberation", M Thesis, [pdf], 2016.
  • Christian Haar. "Analysis of Room Impulse Responses Measured with Compact Spherical Microphone and Loudspeaker Arrays", M. Thesis, ITA, RWTH-Aachen, 2016.
  • Annika Neidhardt. "Untersuchung zur räumlichen Genauigkeit bei der binauralen Auralisation von Kugelarraydaten", [pdf], 2015.
  • Philipp Alexaner Hack. "Multiple Source Localization with Distributed Tetrahedral Microphone Arrays", [pdf], 2015. (WKO Scholarship 2014)
  • Ben-Daniel Keller. "Development of a Sound Projection Prototype", [pdf], 2015. (WKO Scholarship 2014, DEGA Student Grant 2015, DAGA Poster Award 2015)
  • Juan Andrés Ureta Staackmann. "Simulation of Room Transfer Functions With Directivity Patterns On The Basis Of Room Modes", [pdf], 2014.
  • Stefan Lösler. "MIMO-Rekursivfilter für Kugelarrays", [pdf], 2014. (DEGA Student Grant 2015, DAGA Poster Award 2015)
  • Matthias Kronlachner. "Spatial Transformations for the Alteration of Ambisonic Recordings", [pdf], 2014. (Gold in AES Student Design Competition 2014)
  • Ander Gaspar Perez Palacios. "Measurement and evaluation of room impulse response measurements performed with a flexible highly directive source", thesis in collaboration with ITA RWTH-Aachen, [pdf], 2014
  • Clara Hollomey. "Real-Time Spectrogram Inversion – Retrieving Primal Signals", [pdf], 2014.
  • Florian Wendt. "Untersuchung von Phantomschallquellen vertikaler Lautsprecheranordnungen", [pdf], 2013.
  • Florian Pausch. "A Rigid Double Cone Microphone Array Prototype", [pdf], 2013. (Gold in AES Student Design Competition 2013)
  • Philipp Schmidt. "Improvements in Localisation of Planar Acoustic Holography", [pdf], 2012. (DEGA student Prize 2014)
  • Fabio Kaiser. "Modal Analysis of Rigid Microphone Arrays using Boundary Elements", [pdf], 2012.
  • Markus Zaunschirm."Modal beamforming using planar circular microphone arrays", 2012.
  • Johannes Zaar. "Phase Unwrapping for Spherical Interpolation of Head-Related Transfer Functions", [pdf], 2011.
  • Nadine Kroher. "Acoustic feedbacks of loudspeaker-room-microphone environments with directivity", [pdf], 2011.
  • Ralf Baumgartner. "Time Domain Fast-Multipole Translation for Ambisonics", [pdf], 2011.
  • Thomas Kößler. "Kugelkappenförmige Mikrofonanordnung zur 3-dimensionalen Erfassung des Schallfeldes", [pdf], 2011.
  • Sebastian Preis. "Richtungshörmodell mit Elevation und Korrektur der Mehrdeutigkeiten", [pdf], 2011.
  • Wolfgang Nemitz. "Simulation and design of a measurement tube for microphones", [to pdf], 2010.
  • Daniel Deboy. "Acoustic Centering and Rotational Tracking in Surrounding Spherical Microphone Arrays", [pdf], 2010. (DEGA Student Prize 2011)
  • Michael Kerscher. "Compact Spherical Loudspeaker Array for Variable Sound-Radiation", [pdf], 2010.
  • Peter Plessas. "Rigid sphere microphone arrays for spatial recording and holography", [to pdf], 2009.
  • Fabian Hohl. "Kugelmikrofonarray zur Abstrahlungsvermessung von Musikinstrumenten", [to pdf], 2009.
  • Matthias Frank. "Perzeptiver Vergleich von Schallfeldreproduktionsverfahren unterschiedlicher räumlicher Bandbreite", [to pdf], 2009.
  • Hannes Pomberger. "Angular and Radial Directivity Control for Spherical Loudspeaker Arrays", [pdf], 2008.
  • Daniel Hofer. "Implementierung eines 64 Kanal Mikrofonarrays", [to pdf], 2008.

"Toningenieur" projects:

  • Tim Raspel, "Vector-Base Amplitude Panning - VST Plugin Implementation", [pdf], 2017.
  • Sebastian Grill, "VST-Implementierung Ambisonischer Nachhalleffekte", [pdf], 2017.
  • Rainer Mittmannsgruber. "Adaptive MISO-Filter zur möglichst konstruktiven
    Mehrkanalsignalüberlagerung", [pdf], 2016.
  • Patrick Ziegler. "Studie zur Anwendung von DirAC höherer Ordnung auf Eigenmikesignale", [pdf], 2016.
  • Stefan Lösler. "Schallfeldspezifische Entzerrung bei Radialfiltern begrenzter Dynamik für das Eigenmike", [pdf], 2013.
  • Sebastian Süss. "Auffinden von Ursignalen aus Aufnahmen umgebender kugelförmiger Mikrofonanordnungen", [to pdf], 2011.
  • Johannes Zaar. "Vermessung von Außenorhübertragungsfunktionen mit reziproker Messmethode", [pdf], 2010.
  • Stefan Richardt. "Implementierung eines Modells zur Messung und Darstellung binauraler Lokalisation (Implementation of a model for measuring and illustrating binaural sound localization)", [pdf], 2010.
  • Christian Siller. "Beamforming mit einem Miniatur-Line-Arrays", [pdf], 2010.
  • Sebastian Rieck. "Implementierung einer Ausfallsverschleierung mittels spektraler Signalmodellierung", [pdf], 2009.
  • Georg Koller. "Verbesserung der virtuellen Akustik für Kopfhörer durch Berücksichtigung von Schulterdrehungen relativ zum Kopf", [pdf], 2008.
  • Matthias Frank. "Hörversuch zur Lokalisation bei verschiedenen Ambisonics-Decodern", [pdf], 2008.
  • Margherita Jammer. "Modeling sounds of Gamelan Instruments with Exponentially Decaying Sinusoids", [pdf], 2008.
  • Fabian Hohl. "Sound and Radiation Analysis of Multichannel Gamelan Sound Samples", [pdf], 2008.
  • Peter Reiner, Christian Jochum. "Measurement and Evaluation of Crosstalk within an Icosehedral Loudspeaker Array", [pdf], 2007.
  • Christian Jochum, Peter Reiner. "Driving Filters for the Icosahedral Louspeaker Array", [pdf], 2007.

Bachelorarbeit (Betreuer: Alois Sontacchi)

  • Robert Baumgartner, Elmar Messner. "Auswirkung der Abstrahlcharakteristik auf die Klangfarbe von Querflöten und Saxofonen", [to pdf], 2010.