Publications

2012

H. Wierstorf, S. Spors, and A. Raake. Perception and evaluation of sound fields.
In 59th Open Seminar on Acoustics, June 2012.
[ paper ]

S. Spors and H. Wierstorf. Evaluation of perceptual properties of phase-mode beamforming in the context of data-based binaural synthesis.
In International Symposium on Control, Communications, and Signal Processing, May 2012.
[ paper ]

M. Geier, T. Hohn, and S. Spors. An open source C++ framework for multithreaded realtime multichannel audio applications.
In Linux Audio Conference, pages 183-188, Standford, USA, April 2012.
[ paper ]

S. Spors, H. Wierstorf, and M. Geier. Comparison of modal versus delay-and-sum beamforming in the context of data-based binaural synthesis.
In 132nd AES Convention. Audio Engineering Society (AES), April 2012.
[ paper ]

H. Wierstorf and S. Spors. Sound field synthesis toolbox.
In 132nd AES Convention. Audio Engineering Society (AES), April 2012.
[ paper ] [ sources ]

J. Ahrens and S. Spors. Wave field synthesis of a sound field described by spherical harmonics expansion coefficients.
Journal of the Acoustical Society of America (JASA), 131(3):2190-2199, March 2012.
[ http ]

M. Cobos, S. Spors, J. Ahrens, and J.J. Lopez. On the use of small microphone arrays for wave field synthesis auralization.
In AES 45th AES International Conference.Audio Engineering Society (AES) , March 2012.
[ http ]

S. Spors and H. Wierstorf. On the implementation of range extrapolation of head-related impulse responses by virtual sound field synthesis.
In German Annual Conference on Acoustics (DAGA), March 2012.
[ paper ]

K. Helwani, T. Rettberg, S. Spors, and H. Buchner. Towards a modular system for real-time multiple-input/multiple-output audio processing.
In German Annual Conference on Acoustics (DAGA), March 2012.
[ paper ]

S. Ciba, K. Helwani, H. Wierstorf, K. Obermayer, A. Raake, and S. Spors. Employing a binaural auditory model to classify everyday sound events.
In German Annual Conference on Acoustics (DAGA), March 2012.
[ paper ]

H. Wierstorf, A. Raake, and S. Spors. Psychoakustik der Wellenfeldsynthese: Vor- und nachteile von binauraler simulation.
In German Annual Conference on Acoustics (DAGA), March 2012.
[ paper ]

T. Rettberg, K. Helwani, S. Spors, and H. Buchner. Practical aspects of the calibration of spherical microphone arrays.
In German Annual Conference on Acoustics (DAGA), March 2012.
[ paper ]

S. Weinzierl, K. Brandenburg, D. de Vries, A. Lindau, H.-J. Maempel, S. van de Par, B. Rafaely, S. Spors, and M. Vorländer. The SEACEN project.
In German Annual Conference on Acoustics (DAGA), March 2012.

J. Ahrens and S. Spors. Applying the ambisonics approach to planar and linear distributions of secondary sources and combinations thereof.
Acta Acustica united with Acustica, 98(1):28-36, January 2012. doi:10.3813/AAA.918489.
[ http ]

2011

J. Ahrens and S. Spors. Wave field synthesis of moving virtual sound sources with complex radiation properties.
Journal of the Acoustical Society of America (JASA), 130(5):2807-2816, November 2011. doi:10.1121/1.3640850.
[ http ]

B. Bernschütz, C. Pörschmann, S. Spors, and S. Weinzierl. SOFiA – Sound field analysis toolbox.
In International Conference on Spatial Audio, Detmold, Germany, November 2011.
[ paper ] [ sources ]

J. Ahrens and S. Spors. Two physical models for spatially extended virtual sound sources.
In 131th AES Convention. Audio Engineering Society (AES), October 2011.
[ paper ]

S. Spors, K. Helwani and J. Ahrens. Local sound field synthesis by virtual acoustic scattering and time-reversal.
In 131th AES Convention. Audio Engineering Society (AES), October 2011.
[ paper ]

S. Spors, V. Kuscher, and J. Ahrens. Efficient realization of model-based rendering for 2.5-dimensional near-field compensated higher order ambisonics.
In IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, New Paltz, USA, October 2011.
[ paper ]

H. Wierstorf, S. Spors, and A. Raake. Assessment of the perception of synthesized sound fields with a binaural model.
In Forum Acousticum, June 2011.
[ paper ]

S. Spors and J. Ahrens.
Interpolation and range extrapolation of head-related transfer functions using virtual local sound field synthesis.
In 130th AES Convention. Audio Engineering Society (AES), May 2011.
[ paper ]

J. Ahrens and S. Spors.
On the scattering of synthetic sound fields.
In 130th AES Convention. Audio Engineering Society (AES), May 2011.
[ paper ]

H. Wierstorf, M. Geier, A. Raake, and S. Spors.
A free database of head related impulse response measurements in the horizontal plane with multiple distances.
In 130th AES Convention. Audio Engineering Society (AES), May 2011.
[ paper ]

K. Helwani, S. Spors, and H. Buchner.
Spatio-temporal signal preprocessing for multichannel acoustic echo cancellation.
In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), May 2011.

J. Ahrens and S. Spors.
An analytical approach to local sound field synthesis using linear arrays of loudspeakers.
In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), May 2011.
[ paper ]

S. Spors and J. Ahrens.
Efficient range extrapolation of head-related impulse responses by wave field synthesis techniques.
In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), May 2011.
[ paper ]

J. Ahrens and S. Spors.
Über die Streuung im synthetischen Schallfeld.
In German Annual Conference on Acoustics (DAGA), March 2011.
[ paper ]

B. Bernschütz, C. Pörschmann, S. Spors, and S. Weinzierl.
Zeitinvarianzen durch Temperaturveränderung bei sequentiellen sphärischen Mikrofonarrays im Plane Wave Decomposition Verfahren.
In German Annual Conference on Acoustics (DAGA), March 2011.

B. Bernschütz, C. Pörschmann, S. Spors, and S. Weinzierl.
Soft-limiting der modalen Amplitudenverstärkung bei sphärischen Mikrofonarrays im Plane Wave Decomposition Verfahren.
In German Annual Conference on Acoustics (DAGA), March 2011.

K. Helwani, S. Spors, and H. Buchner.
Calibration of microphone arrays with arbitrary geometries.
In German Annual Conference on Acoustics (DAGA), March 2011.
[ paper ]

S. Spors.
Schallfeldsynthese: Stand der Technik und Perspektiven.
In German Annual Conference on Acoustics (DAGA), March 2011.
[ paper ]

S. Spors and J. Ahrens.
Generation of far-field head-related transfer functions using sound field synthesis.
In German Annual Conference on Acoustics (DAGA), March 2011.
[ paper ]

H. Wierstorf, S. Spors, and A. Raake.
Binaurale Modellierung der Wahrnehmung mit Wellenfeldsynthese generierter Schallfelder.
In German Annual Conference on Acoustics (DAGA), March 2011.
[ paper ]

2010

K. Helwani, H. Buchner, and S. Spors.
On the robust and efficient computation of the kalman gain for multichannel adaptive filtering with application to acoustic echo cancellation.
In Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, USA, November 2010.

J. Ahrens and S. Spors.
On the anti-aliasing loudspeaker for sound field synthesis employing linear and circular distributions of secondary sources.
In 129th AES Convention, San Fransisco, USA, November 2010. Audio Engineering Society (AES).

H. Wierstorf, M. Geier, and S. Spors.
Reducing artifacts of focused sources in wave field synthesis.
In 129th AES Convention, San Fransisco, USA, November 2010. Audio Engineering Society (AES).
[ paper ] [ presentation ]

M. Geier, J. Ahrens, and S. Spors.
Object-based audio reproduction and the audio scene description format.
Organized Sound, 15(3):219-227, October 2010.
doi:10.1017/S1355771810000324.

M. Geier and S. Spors.
Conducting psychoacoustic experiments with the soundscape renderer.
In 9.ITG Fachtagung Sprachkommunikation, October 2010.
[ paper ]

S. Spors and J. Ahrens.
Local sound reproduction by virtual secondary sources.
In AES 40th International Conference on Spatial Audio, Tokyo, Japan, October 2010. Audio Engineering Society (AES).
[ paper ] [ presentation ]

J. Ahrens, H. Wierstorf, and S. Spors.
Comparison of higher order ambisonics and wave field synthesis with respect to spatial discretization artifacts in time domain.
In AES 40th International Conference on Spatial Audio, Tokyo, Japan, October 2010. Audio Engineering Society (AES).
[ paper ]

M. Cobos, J.J. Lopez, and S. Spors.
A sparsity-based approach to 3-D binaural sound synthesis using time-frequency array processing.
EURASIP Journal on Advances in Signal Processing, 2010:13, 2010.
doi:10.1155/2010/415840.
[ Link ]

J. Ahrens and S. Spors.
Sound field reproduction using planar and linear arrays of loudspeakers.
In IEEE Transactions on Audio, Speech and Language Processing, 2010.
[ doi ]

M. Geier, S. Spors, and S. Weizierl.
The future of audio reproduction: Technolgy – Formats – Applications.
In M. Detyniecki, U. Leiner, and A. Nürnberger, editors, Adaptive Multimedia Retrieval. Identifying, Summarizing, and Recommending Image and Music, pages 1-17. Springer, 2010.
[ paper ]

R. Schleicher, S. Spors, D. Jahn, and R. Walter.
Gaze as a measure of sound source localization.
In 38th AES 38th International Conference on Sound Quality Evaluation, June 2010. Audio Engineering Society (AES).

S. Spors and J. Ahrens.
Analysis and improvement of pre-equalization in 2.5-dimensional Wave Field Synthesis.
In 128th AES Convention, London, UK, May 2010. Audio Engineering Society (AES).
[ paper ] [ presentation ]

J. Ahrens, M. Geier, and S. Spors.
Perceptual assessment of delay accuracy and loudspeaker misplacement in Wave Field Synthesis.
In 128th AES Convention, London, UK, May 2010. Audio Engineering Society (AES).
[ paper ]

M. Geier, H. Wierstorf, I. Wechsung, J. Ahrens, A. Raake and S. Spors.
Perceptual evaluation of focused sources in Wave Field Synthesis.
In 128th AES Convention, London, UK, May 2010. Audio Engineering Society (AES).
[ paper ] [ presentation ]

J. Ahrens and S. Spors.
Applying the Ambisonics approch on planar and linear arrays of loudspeakers.
In Ambisonics Symposium, Paris, France, May 2010.
[ paper ]

S. Uppenkamp and H. Wierstorf.
Representation of Intelligible and Distorted Speech in Human Auditory Cortex.
In Enrique A. Lopez-Poveda, A. Palmer, R. Meddis, editors, The Neurophysiological Bases of Auditory Perception, pages 381-391, Springer, April 2010.

M. Cobos, J.J. Lopez, and S. Spors.
Analysis of room reverberation effects in source localization using
small microphone arrays.
In Fourth IEEE-EURASIP International Symposium on Control,
Communications, and Signal Processing
, March 2010.

J. Ahrens and S. Spors.
An analytical approach to 3D sound field reconstruction employing
spherical distributions of non-omnidirectional loudspeakers.
In Fourth IEEE-EURASIP International Symposium on Control,
Communications, and Signal Processing
, March 2010.
[ paper ]

S. Spors and J. Ahrens.
Reproduction of focused sources by the spectral division method.
In Fourth IEEE-EURASIP International Symposium on Control,
Communications, and Signal Processing
, March 2010.
[ paper ] [ presentation ]

S. Spors, R. Schleicher, D. Jahn, and R. Walter.
On the use of eye movements in acoustic source localization
experiments.
In German Annual Conference on Acoustics (DAGA), March 2010.

H. Wierstorf, A. Raake, and S. Spors.
Die Rolle des Pr&¨zedenzeffektes bei der Wahrnehmung von
Räumlichen Aliasingartefakten bei der Wellenfeldsynthese.
In German Annual Conference on Acoustics (DAGA), March 2010.
[ paper ] [ presentation ]

J. Ahrens, M. Geier, and S. Spors.
Perceptual comparison of wave field synthesis implemented with
integer and fractional delays.
In German Annual Conference on Acoustics (DAGA), March 2010.
[ paper ]

F. Kettler, S. Poschen, A. Raake, and S. Spors.
Advanced testing of wideband terminals.
In German Annual Conference on Acoustics (DAGA), March 2010.

B. Bernschütz, C. Pörschmann, S. Spors, and S. Weinzierl.
Entwurf und Aufbau eines variablen sphärischen Mikrofonarrays
für Forschungsanwendungen in Raumakustik und virtual Audio.
In German Annual Conference on Acoustics (DAGA), March 2010.

K. Helwani, H. Buchner, and S. Spors.
Source-domain adaptive filtering for MIMO systems with application
to acoustic echo cancellation.
In IEEE International Conference on Acoustics, Speech, and
Signal Processing (ICASSP)
, March 2010.
[ paper ]

J. Ahrens and S. Spors.
An analytical approach to 2.5D sound field reproduction employing
linear distributions of non-omnidirectional loudspeakers.
In IEEE International Conference on Acoustics, Speech, and
Signal Processing (ICASSP)
, March 2010.
[ paper ]

2009

J. Ahrens and S. Spors.
Artifacts in the sound field of a moving sound source reconstructed
from a microphone array recording.
In IEEE Workshop on Applications of Signal Processing to Audio
and Acoustics
, New Paltz, USA, October 2009.
[ paper ]

A. Raake, M. Wältermann, and S. Spors.
Which wideband speech codec? quality impact due to room-acoustics at
send side and presentation method.
In 127th AES Convention, New York, USA, October 2009. Audio
Engineering Society (AES).
[ paper ]

S. Spors, H. Wierstorf, M. Geier, and J. Ahrens.
Physical and perceptual properties of focused sources in wave field
synthesis.
In 127th AES Convention. Audio Engineering Society (AES),
October 2009.
[ paper ] [ presentation ]

J. Ahrens and S. Spors.
On the secondary source type mismatch in wave field synthesis
employing circular distributions of loudspeakers.
In 127th AES Convention, New York, USA, October 2009. Audio
Engineering Society (AES).
[ paper ]

S. Spors, H. Buchner, and K. Helwani.
Block-based multichannel transform-domain adaptive filtering.
In European Signal Processing Conference (EUSIPCO), Glasgow,
UK, August 2009.
[ paper ]

J. Ahrens and S. Spors.
An analytical approach to 2.5D sound field reproduction employing
circular distributions of non-omnidirectional loudspeakers.
In European Signal Processing Conference (EUSIPCO), Glasgow,
UK, August 2009.
[ paper ]

P. Annibale, R. Rabenstein, S. Spors, and P. Steffen.
A short review of signals and systems for spatial audio.
In European Signal Processing Conference (EUSIPCO), Glasgow,
UK, August 2009.
[ paper ]

J. Ahrens and S. Spors.
Spatial encoding and decoding of focused virtual sound sources.
In Ambisonics Symposium, Graz, Austria, June 2009.
[ paper ]

S. Spors
Comparison of Wave Field Synthesis and Higher-order Ambosnics.
Invited talk at Ambisonics Symposium, Graz, Austria, June 2009.
[ presentation ]

S. Spors and J. Ahrens.
Spatial aliasing artifacts of wave field synthesis for the
reproduction of virtual point sources.
In 126th AES Convention, Munich, Germany, May 2009. Audio
Engineering Society (AES).
[ paper ]

J. Ahrens and S. Spors.
Sound field reproduction employing non-omnidirectional loudspeakers.
In 126th AES Convention, Munich, Germany, May 2009. Audio
Engineering Society (AES).
[ paper ]

J. Ahrens and S. Spors.
Alterations of the temporal spectrum in high-resolution sound field
reproduction of different spatial bandwidths.
In 126th AES Convention, Munich, Germany, May 2009. Audio
Engineering Society (AES).
[ paper ]

J. Ahrens and S. Spors.
An analytical approach to sound field reproduction with a movable
sweet spot using circular distributions of loudspeakers.
In IEEE International Conference on Acoustics, Speech, and
Signal Processing (ICASSP)
, Taipei, Taiwan, April 2009.
[ paper ]

J. Ahrens and S. Spors.
Timbral coloration in high resolution sound field reproduction due to
spatial bandwidth limitation.
In NAG-DAGA International Conference on Acoustics, Rotterdam,
The Netherlands, March 2009.
[ paper ]

S. Spors and J. Ahrens.
Spatial sampling artifacts of focused sources in wave field
synthesis.
In NAG-DAGA International Conference on Acoustics, Rotterdam,
The Netherlands, March 2009.
[ paper ] [ presentation ]

M. Geier, J. Ahrens, and S. Spors.
Binaural monitoring of massive multichannel sound reproduction
systems using model-based rendering.
In NAG-DAGA International Conference on Acoustics, Rotterdam,
The Netherlands, March 2009.
[ paper ]

2008

J. Ahrens and S. Spors.
An analytical approach to sound field reproduction using circular and
spherical loudspeaker distributions.
Acta Acoustica united with Acoustica, 94(6):988-999, December 2008.

H. Buchner and S. Spors.
A general derivation of wave-domain adaptive filtering and
application to acoustic echo cancellation.
In Asilomar Conference on Signals, Systems, and Computers,
Pacific Grove, USA, October 2008.

S. Spors and J. Ahrens.
A comparison of wave field synthesis and higher-order ambisonics with
respect to physical properties and spatial sampling.
In 125th AES Convention, San Fransisco, USA, October 2008.
Audio Engineering Society (AES).
[ paper ] [ presentation ]

J. Ahrens and S. Spors.
Reproduction of virtual sound sources moving at supersonic speeds in
wave field synthesis.
In 125th AES Convention, San Fransisco, USA, October 2008.
Audio Engineering Society (AES).
[ paper ]

H. Wierstorf and S. Uppenkamp.
Representation of Distorted and Intelligible Speech in Human Cortex.
In German Annual Conference of Medical Physics (DGMP), Oldenburg, September 2008.
[ poster ]

S. Spors and H. Buchner.
Multichannel transform domain adaptive filtering: A two stage
approach and illustration for acoustic echo cancellation.
In 11th International Workshop on Acoustic Echo and Noise
Control (IWAENC)
, Seattle, USA, September 2008.
[ paper ]

S. Poschen, F. Kettler, A. Raake, and S. Spors.
Wideband echo perception.
In 11th International Workshop on Acoustic Echo and Noise
Control (IWAENC)
, Seattle, USA, September 2008.

H.W. Gierlich, S. Poschen, F. Kettler, A. Raake, S. Spors, and M. Geier.
Echo perception in wideband telecommunication scenarios – comparison
to E-models narrowband echo findings.
In ITU-T workshop on ‘From Speech to Audio: bandwidth
extension, binaural perception’
, Lannion, France, September 2008.

H.W. Gierlich, S. Poschen, F. Kettler, A. Raake, and S. Spors.
Optimum frequency response characteristics for wideband terminals.
In ITU-T workshop on ‘From Speech to Audio: bandwidth
extension, binaural perception’
, Lannion, France, September 2008.

M. Geier and S. Spors.
ASDF: Audio scene description format.
In International Computer Music Conference (ICMC), Belfast,
Ireland, August 2008.
[ paper ]

T. Schaefers, M. Rohs, S. Spors, A. Raake, and J. Ahrens.
Designing low-dimensional interaction for mobile navigation in 3D
audio spaces.
In 34th International AES Conference, Jeju Island, Korea,
August 2008. Audio Engineering Society (AES).
[ paper ]

S. Spors, H. Buchner, and R. Rabenstein.
Spatio-temporal adaptive inverse filtering in the wave domain.
In E. Haensler and G. Schmidt, editors, Speech and Audio
Processing in Adverse Environments
, pages 551-583. Springer, 2008.

J. Ahrens and S. Spors.
Notes on the reproduction of moving virtual sound sources.
In Acoustics’08, Paris, France, July 2008.

S. Spors and J. Ahrens.
Towards a theory for arbitrarily shaped sound field reproduction
systems.
In Acoustics’08, Paris, France, July 2008.

K. Bredies, N.A. Mann, J. Ahrens, M. Geier, S. Spors, and M. Nischt.
The multi-touch soundscape renderer.
In 9th International Working Conference on Advanced Visual
Interfaces
, Napoli, Italy, May 2008.
[ paper ]

J. Ahrens and S. Spors.
Reproduction of moving virtual sound sources with special attention to the doppler effect.
In 124th AES Convention, Amsterdam, The Netherlands, May 2008. Audio Engineering Society (AES).
[ paper ]

J. Ahrens and S. Spors.
Focusing of virtual sound sources in higher order ambisonics.
In 124th AES Convention, Amsterdam, The Netherlands, May 2008. Audio Engineering Society (AES).
[ paper ]

S. Spors, R. Rabenstein, and J. Ahrens.
The theory of wave field synthesis revisited. In 124th AES Convention, Amsterdam, The Netherlands, May 2008. Audio Engineering Society (AES).
[ paper ] [ presentation ]

M. Geier, J. Ahrens, and S. Spors.
The SoundScape renderer: A unified spatial audio reproduction framework for arbitrary rendering methods.
In 124th AES Convention, Amsterdam, The Netherlands, May 2008. Audio Engineering Society (AES).
[ paper ]

J. Hannemann, C.A. Leedy, K.D. Donohue, S. Spors, and A. Raake.
A comparative study of perceptual quality between wavefield synthesis and multipole-matched rendering for spatial audio.
In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), April 2008.

J. Ahrens and S. Spors.
Analytical driving functions for higher-order ambisonics.
In IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), April 2008.
[ paper ]

J. Ahrens and S. Spors.
Notes on rendering of focused directional sound sources in wave field synthesis.
In 34rd German Annual Conference on Acoustics (DAGA), Dresden, Germany, March 2008.
[ paper ]

S. Spors.
Investigation of spatial aliasing artifacts of wave field synthesis in the temporalFourth IEEE-EURASIP International Symposium on Control,
Communications, and Signal Processing domain.
In 34rd German Annual Conference on Acoustics (DAGA), Dresden, Germany, March 2008.
[ paper ]

M. Geier, J. Ahrens, and S. Spors.
ASDF: Einnbsp;Spors.
Die Rolle des Pr XML Format zur Beschreibung von virtuellen 3D-Audioszenen.
In 34rd German Annual Conference on Acoustics (DAGA), Dresden, Germany, March 2008.
[ paper ]

A. Raake, S. Spors, H.-J. Maempel, T. Marszalek, S. Ciba, and N. Cote.
Speech quality of wide- and narrowband codecs: Object- and subject oriented view.
In 34rd German Annual Conference on Acoustics (DAGA), Dresden, Germany, March 2008.
[paper ]

H. Wierstorf and S. Uppenkamp.
Melodiediskrimination für Kammfilterrauschen: zeitliche oder spektrale Kodierung?
In 34rd German Annual Conference on Acoustics (DAGA), Dresden, Germany, March 2008.
[paper ] [presentation ]

S. Poschen, F. Kettler, A. Raake, and S. Spors.
Testing wideband terminals.
In 34rd German Annual Conference on Acoustics (DAGA), Dresden,
Germany, March 2008.

J. Ahrens and S. Spors.
Reproduction of a plane-wave sound field using planar and linear arrays of loudspeakers.
In Third IEEE-EURASIP International Symposium on Control, Communications, and Signal Processing, March 2008.
[ paper ]

S. Spors and H. Buchner.
Efficient massive multichannel active noise control using wave-domain adaptive filtering.
In Third IEEE-EURASIP International Symposium on Control, Communications, and Signal Processing, March 2008.
[ paper ] ]

M.