About the Author

Biography

Jens Ahrens is Associate Professor at the Division of Applied Acoustics at Chalmers University of Technology in Gothenburg, Sweden. He received a Diplom in Electrical Engineering/Sound Engineering (equivalent to an M.Sc.) from Graz University of Technology and University of Music and Dramatic Arts Graz, Austria, in 2005 and the Doctoral Degree (Dr.-Ing.) from University of Technology Berlin, Germany, in 2010. From 2006 to 2011, he was member of the Audio Technology Group at Deutsche Telekom Laboratories / TU Berlin where he worked on the topic of sound field synthesis. From 2011 to 2013 he was a Postdoctoral Researcher at Microsoft Research in Redmond, Washington, USA, after which he re-joined the Quality and Usability Lab at University of Technology Berlin. In the fall/winter terms 2015/16, he was Visiting Scholar at the Center for Computer Research in Music and Acoustics (CCRMA) at Stanford University. He is an Associate Editor of the IEEE Signal Processing Letters. His scientific reviewer profile can be found on Publons.

Awards and Grants

  • Top 25 Reviewer of the Audio Engineering Society 2018
  • Horizon 2020 – FET Open (Levitate)
  • DAAD Postdoc grant, DAAD travel grant
  • DFG grant AH 269/2-1
  • Literature award 2013 of the Information Technology Society (ITG at VDE) for the book “Analytic Methods of Sound Field Synthesis”
  • Doctoral degree awarded with distinction
  • Diploma degree awarded with distinction

Selected Presentations

  • J. Ahrens and Duo Granmo-Berg, “The Acoustics of Musical Performance,” AHA! Festival, Gothenburg, Sweden, 2019 (invited presentation)
  • J. Ahrens, S. Spors, H. Wierstorf: Sound Field Synthesis using Loudspeaker Arrays. Workshop on Binaural Factors and Compensation Schemes in Hearing Impairment, Hanse-Wissenschaftskolleg, Delmenhorst, Germany, 2015 (invited presentation)
  • J. Ahrens, J.-N. Antons, S. Moeller: From Speech Communication to Audio Communication, World Telecommunications Congress (WTC), Berlin, 2014 (invited presentation) [ Abstract ]
  • Jens Ahrens: The Psychoacoustics of Synthetic Sound Fields, Hearing Seminar, CCRMA, Stanford University, 2013 [ Abstract ]

Publications

(Jens Ahrens’s profile on Google Scholar)
(Jens Ahrens’s reviewer profile on Publons)

 

Books and Book Chapters

  • R. Rabenstein, S. Spors, and J. Ahrens: Sound Field Synthesis, in R. Chellappa and S. Theodoridis (edt.): “Academic Press Library in Signal Processing: Volume 4”, 1st Edition, Academic Press (Chennai), 2013, p. 915 – 979 [ AP site ]
  • Jens Ahrens: Analytic Methods of Sound Field Synthesis, Springer-Verlag (Berlin/Heidelberg), 2012 [ Springer site ]

Theses

  • Jens Ahrens: The Single-layer Potential Approach Applied to Sound Field Synthesis Including Cases of Non-enclosing Distributions of Secondary Sources. Doctoral Dissertation, Technische Universität Berlin, 2010
  • Jens Ahrens: Voice Transformation. Diploma Thesis, IEM Graz, 2005

Articles in Journals

  • S. Bilbao, J. Ahrens, and B. Hamilton,”Incorporating Source Directivity in Wave-based Virtual Acoustics: Time-domain Models and Fitting to Measured Data,” in J. Acoust. Soc. Am.146 (4), 2019, DOI: 10.1121/1.5130194
  • X. Ma, C. Hohnerlein, J. Ahrens, “Concept and Perceptual Validation of Listener-Position Adaptive Superdirective Crosstalk Cancelation Using a Linear Loudspeaker Array,” in JAES 67(11), p. 871-881, 2019, DOI: 10.17743/jaes.2019.0037
  • J. Ahrens, C. Andersson, “Perceptual evaluation of headphone auralization of rooms captured with spherical microphone arrays with respect to spaciousness and timbre,” in J. Acoust. Soc. Am. 145 (4), April 2019, DOI: 10.1121/1.5096164
  • F. Winter, J. Ahrens, S. Spors, “On Analytic Methods for 2.5D Local Sound Field Synthesis Using Circular Distributions of Secondary Sources,” in IEEE/ACM Transactions on Audio, Speech, and Language Processing, vol. 24, no. 5, pp. 914-926, Feb. 2016, DOI: 10.1109/TASLP.2016.2531902
  • J. Ahrens, R. Rabenstein, S. Spors, “Sound Field Synthesis for Audio Presentation,” in Acoustics Today, vol. 10, no. 2, pp. 15-25, Spring 2014 [ pdf, animations ]
  • A. Avni, J. Ahrens, M. Geier, S. Spors, H. Wierstorf, B. Rafaely, “Spatial Perception of Sound Fields Recorded by Spherical Microphone Arrays with Varying Spatial Resolution,” in JASA, vol. 133, no. 5, pp. 2711-2721, May 2013, DOI: 10.1121/1.4795780
  • J. Ahrens and S. Spors, “A Modal Analysis of Spatial Discretization of Spherical Loudspeaker Distributions Used for Sound Field Synthesis,” in IEEE Transactions on Audio, Speech, and Language Processing, vol. 20, no. 9, pp. 2564-2574, IEEE, November 2012, DOI: 10.1109/TASL.2012.2208625
  • J. Ahrens and S. Spors, “Wave field synthesis of a sound field described by spherical harmonics expansion coefficients,” in JASA, vol. 131, no. 3, pp. 2190-2199, Acoustical Society of America, March 2012, DOI: 10.1121/1.3682036
  • J. Ahrens and S. Spors, “Applying the Ambisonics approach to planar and linear distributions of secondary sources and combinations thereof,” in Acta Acustica utd. with Acustica, vol. 98, no. 1, pp. 28-36, January 2012, DOI: 10.3813/AAA.918489
  • J. Ahrens and S. Spors, “Wave field synthesis of moving virtual sound sources with complex radiation properties,” in JASA, vol. 130, no. 5, pp. 2807-2816, Acoustical Society of America, November 2011, DOI: 10.1121/1.3640850
  • J. Ahrens and S. Spors, “Sound Field Reproduction Using Planar and Linear Arrays of Loudspeakers,” in IEEE Transactions on Audio, Speech, and Language Processing, vol. 18, no. 8, IEEE, November 2010, DOI: 10.1109/TASL.2010.2041106
  • M. Geier, J. Ahrens, and S. Spors, “Object-based Audio Reproduction and the Audio Scene Description Format, in Organized Sound,” vol. 15, no. 3, 2010, DOI: 10.1017/S1355771810000324
  • J. Ahrens and S. Spors, “An Analytical Approach to Sound Field Reproduction Using Circular and Spherical Loudspeaker Distributions,” in Acta Acustica utd. with Acustica, vol. 94, no. 6, November 2008, DOI: 10.3813/AAA.918115

Conference Contributions

2019

  • J. Ahrens, “Perceptual Evaluation of Binaural Auralization of Data Obtained From the Spatial Decomposition Method ” in Proc. of IEEE WASPAA, New Paltz, NY, USA, October 2019 [ pdf ]
  • C. Andersson and J. Ahrens, “Acoustic Levitation from Superposition of Spherical Harmonics Expansions of Elementary Sources: Analysis of Dependency on Wavenumber and Order,” in Proc. of IEEE IUS, Glasgow, UK, October 2019 [ pdf ]
  • S. Bilbao, J. Ahrens, and B. Hamilton, “Local directional source modeling in wave-based acoustic simulation,” in Proc. of ICA, Aachen, Germany, September 2019 [ pdf ]
  • K. Bahri and J. Ahrens, “The Perceptual Effect of Reflective Surfaces on Acoustic Crosstalk Cancelation Using an 8-Channel Linear Loudspeaker Array,” in Proc. of ICA, Aachen, Germany, September 2019 [ pdf ]
  • C. Andersson and J. Ahrens, “Minimum trap separation for acoustical levitation using phased ultrasonic transducer arrays,” in Proc. of ICA, Aachen, Germany, September 2019 [ pdf ]
  • J. Ahrens, “Auralization of Omnidirectional Room Impulse Responses Based on the Spatial Decomposition Method and Synthetic Spatial Data,” in Proc. of IEEE ICASSP, Brighton, UK, May 2019 [ pdf ]
  • J. Ahrens, “The Effect of Loudspeaker Radiation Properties on Acoustic Crosstalk Cancelation Using a Linear Loudspeaker Array,” in Proc. of DAGA, Rostock, Germany, March 2019 [ pdf ]
  • C. Andersson and J. Ahrens, “Measurement-Based Modeling of Higher-Order Non-Linearities of the Parametric Loudspeaker,” in Proc. of DAGA, Rostock, Germany, March 2019 [ pdf ]
  • H. Helmholz, C. Andersson, and J. Ahrens, “Real-Time Implementation of Binaural Rendering of High-Order Spherical Microphone Array Signals,” in Proc. of DAGA, Rostock, Germany, March 2019 [ pdf ]

2018

  • J. Ahrens, H. Helmholz, C. Andersson, “Authentic Auralization Of Acoustic Spaces Based On Spherical Microphone Array Recordings,” Proceedings of the Institute of Acoustics, 2018 [ pdf ]
  • C. Andersson and J. Ahrens, “A Method for Simultaneous Creation of an Acoustic Trap and a Quiet Zone,” in Proc. of IEEE SAM, Sheffield, UK, 2018 [ pdf ]
  • X. Ma, C. Hohnerlein, J. Ahrens, “Listener-Position Adaptive Crosstalk Cancelation Using A Parameterized Superdirective Beamformer,” in Proc. of IEEE SAM, Sheffield, UK, 2018 [ pdf ]
  • J. Ahrens and C. Andersson, “Perzeptive Evaluierung von lautsprecher- und kopfhörerbasierter Auralisierung von Aufnahmen kugelförmiger Mikrofon-Arrays,” in DAGA, Munich, Germany, March 19-22, 2018 [ pdf ]
  • F. Winter, J. Ahrens, S. Spors, “A Geometric Model for Spatial Aliasing in Wave Field Synthesis,” in DAGA, Munich, Germany, March 19-22, 2018 [ pdf ]
  • J. Ahrens, “Impact Of The Locations Of The Control Points On Optimal Solutions For Self-Bending Beamforming,” in 7th Berlin Beamforming Conference, Berlin, Germany, March 5-6, 2018 [ pdf ]

2017

  • J. Ahrens, P. Bartz, M. Geier, S. Spors, “The Interactive SoundScape Renderer for Loudspeaker- and Headphone-Based Spatial Sound Presentation,” Demo at the 23rd ACM Symposium on Virtual Reality Software and Technology, Gothenburg, Sweden, Nov. 2017
  • Jens Ahrens, “Amplitude Engineering for Beamformers with Self-Bending Directivity Based on Convex Optimization,” IEEE WASPAA, New Paltz, NY, 2017 [ pdf ]
  • J. Ahrens, C. Hohnerlein, C. Andersson, “Auralization of acoustic spaces based on spherical microphone array recordings,” Acoustics ’17, Boston, MA, USA, 2017 [ slides ]
  • S. Möller et al., “A Cross-University Massive Open Online Course on Communication Acoustics,” Acoustics ’17, Boston, MA, USA, 2017 [ pdf ]
  • S. Möller et al., “TU9-MOOC Communication Acoustics: Erste Erfahrungen, ” in DAGA, Kiel, Germany, 2017 [ pdf ]
  • C. Hohnerlein, J. Ahrens, “Spherical Microphone Array Processing in Python with the sound_field_analysis-py Toolbox,” in DAGA, Kiel, Germany, 2017 [ pdf ]
  • Jens Ahrens, “Evaluation of the Impact of Spatial Aliasing on Perceived Spaciousness in Wave Field Synthesis,” in DAGA, Kiel, Germany, 2017 [ pdf ]
  • T. Hedke, J. Ahrens, J. Beyer, S. Möller, “Impact of Spatial Audio Presentation on the Quality of Experience of Computer Games,” DAGA, Kiel, Germany, 2017 [ pdf ]
  • Christoph Hohnerlein, Jens Ahrens, “Perceptual Evaluation Of A Multiband Acoustic Crosstalk Canceler Using A Linear Loudspeaker Array,” IEEE ICASSP, New Orleans, LA, USA, 2017 [ pdf ]

2016

  • Jens Ahrens and Ralf Vogelgesang, “A Linear Sensor Array With Self-Bending Sensitivity,” IEEE ICASSP, Shanghai, China, 2016 [ pdf ]
  • Sebastian Möller et al., “Konzeption eines MOOC der TU9 zum Thema Communication Acoustics,” in DAGA, Aachen, Germany, 2016 [ pdf ]
  • Jens Ahrens, “On the Generation of Virtual Early Reflections in Wave Field Synthesis,” in DAGA, Aachen, Germany, 2016 [ pdf, audio examples ]

2015

  • Jens Ahrens and Hagen Wierstorf, “Recent Advancements in Massive Multi-Channel Auralization,” in Proc. of the 170th Meeting of the Acoustical Society of America, Jacksonville, Florida, 2015
  • F. Köster, F. Schiff ner, D. Guse, J. Ahrens, J. Skowronek, S. Möller, “Towards a MATLAB Toolbox for Imposing Speech Signal Impairments Following the P.TCA Schema,” in 139th Convention of the AES, New York, NY, 2015
  • D. Kelvasa, J. Ahrens, J.-N. Antons, “The ventriloquist effect evokes changes in the early spatial processing of auditory stimuli as measured by the mismatch negativity,” in 7th Mismatch Negativity Conference, Leipzig, Germany, 2015 [ poster ]
  • Jens Ahrens, “Perceptual Evaluation of the Diffuseness of Synthetic Late Reverberation Created by Wave Field Synthesis at Different Listening Positions,” in DAGA, Nürnberg, 2015 [ pdf, audio examples ]
  • Jens Ahrens and Hagen Wierstorf, “Properties of Large-scale Sound Field Synthesis,” in 57th Conference of the AES, Hollywood, CA, USA, 2015 [ pdf ]

2014

  • P. Bilinski, J. Ahrens, M.R.P. Thomas, I.J. Tashev, J. Platt, “HRTF Magnitude Synthesis via Sparse Representation of Anthropometric Features,” in IEEE ICASSP, Florence, Italy, 2014 [ pdf ]
  • M.R.P. Thomas, J. Ahrens, I.J. Tashev, “A Method for Converting Between Circular and Spherical Harmonic Representations of Sound Fields,” in IEEE ICASSP, Florence, Italy, 2014 [ pdf ]
  • Jens Ahrens, “Challenges in the Creation of Artificial Reverberation for Sound Field Synthesis: Early Reflections and Room Modes,” in EAA Joint Symposium on Auralization and Ambisonics, Berlin, Germany, 2014 [ pdf, animations ]

2013

  • J. Ahrens, M.R.P. Thomas, and I. Tashev, “Gentle Acoustic Crosstalk Cancelation Using the Spectral Division Method and Ambiophonics,” in IEEE WASPAA, New Paltz, NY, USA, 2013 [ pdf ]
  • J. Ahrens, M.R.P. Thomas, and I. Tashev,” in Efficient Implementation of the Spectral Division Method for Arbitrary Virtual Sound Fields,” in IEEE WASPAA, New Paltz, NY, USA, 2013 [ pdf ]

2012

  • J. Ahrens, M.R.P. Thomas, and I. Tashev, “HRTF Magnitude Modeling Using a Non-Regularized Least-squares Fit of Spherical Harmonics Coefficients on Incomplete Data,” in APSIPA, Hollywood, CA, USA, 2012 [ pdf ]
  • M.R.P. Thomas, J. Ahrens, and I. Tashev, “Beamformer Design Using Measured Microphone Directivity Patterns: Robustness and Modelling Error,” in APSIPA, Hollywood, CA, USA, 2012 [ pdf ]
  • M.R.P. Thomas, J. Ahrens, and I. Tashev, “Optimal 3D Beamforming Using Measured Microphone Directivity Patterns,” in IWAENC, Aachen, Germany, 2012 [ pdf ]
  • M. Cobos, S. Spors, J. Ahrens, and J.J. Lopez, “On the Use of Small Microphone Arrays for Wave Field Synthesis Auralization,” in 45th Conference of the AES, Helsinki, Finland, 2012 [ pdf ]

2011

  • S. Spors, V. Kuscher, and J. Ahrens: Efficient Realization of Model-Based Rendering for 2.5-dimensional Near-Field Compensated Higher Order Ambisonics. IEEE WASPAA, New Paltz, NY, USA, 2011 [ pdf ]
  • S. Spors, K. Helwani, and J. Ahrens: Local sound field synthesis by virtual acoustic scattering and time-reversal. 131st Convention of the AES, NYC, NY, USA, 2011 [ pdf ]
  • Jens Ahrens and Sascha Spors: Two Physical Models for Spatially Extended Virtual Sound Sources. 131st Convention of the AES, NYC, NY, USA, 2011 [ pdf ]
  • Jens Ahrens and Sascha Spors: An Analytical Approach to Local Sound Field Synthesis Using Linear Arrays of Loudspeakers. IEEE ICASSP, Prague, Czech Republic, 2011 [ pdf ]
  • Sascha Spors and Jens Ahrens: Efficient Range Extrapolation of Head-Related Impulse Responses by Wave Field Synthesis Techniques. IEEE ICASSP, Prague, Czech Republic, 2011 [ pdf ]
  • Jens Ahrens and Sascha Spors: On the Scattering of Synthetic Sound Fields. 130th Convention of the AES, London, UK, 2011 [ pdf ]
  • S. Spors, H. Wierstorf, J. Ahrens: Interpolation and Range Extrapolation of Head-Related Transfer Functions Using Virtual Local Wave Field Synthesis. 130th Convention of the AES, London, UK, 2011 [ pdf ]
  • Sascha Spors and Jens Ahrens: Generation of far-field head-related transfer functions using sound field synthesis. DAGA, Düsseldorf, 2011 [ pdf ]
  • Jens Ahrens und Sascha Spors: Über die Streuung im synthetischen Schallfeld. DAGA, Düsseldorf, 2011 [ pdf ]

2010

  • Jens Ahrens and Sascha Spors: On the Anti-Aliasing Loudspeaker for Sound Field Synthesis Employing Linear and Circular Distributions of Secondary Sources. 129th Convention of the AES, San Francisco, CA, USA, Nov. 4-7, 2010 [ pdf ]
  • 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. 40th Conference of the AES, Tokyo, Japan, Oct. 8-10, 2010 [ pdf ]
  • Sascha Spors and Jens Ahrens: Local Sound Field Synthesis by Virtual Secondary Sources. 40th Conference of the AES, Tokyo, Japan, Oct. 8-10, 2010 [ pdf ]
  • A. Raake, C. Schlegel, M. Geier, J. Ahrens: Listening and Conversational Quality of Spatial Audio Conferencing. 40th Conference of the AES, Tokyo, Japan, Oct. 8-10, 2010 [ pdf ]
  • M. Geier, H. Wierstorf, J. Ahrens, I. Wechsung, A. Raake, S. Spors: Perceptual Evaluation of Focused Sources in Wave Field Synthesis. 128th Convention of the AES, London, UK, May 22-25, 2010 [ pdf ]
  • Sascha Spors, Jens Ahrens: Analysis and improvement of pre-equalization in 2.5-dimensional wave field synthesis. 128th Convention of the AES, London, UK, May 22-25, 2010 [ pdf ]
  • Jens Ahrens, Matthias Geier, Sascha Spors: Perceptual assessment of delay accuracy and loudspeaker misplacement in Wave Field Synthesis. 128th Convention of the AES, London, UK, May 22-25, 2010 [ pdf ]
  • Jens Ahrens, Sascha Spors: Applying the Ambisonics approach on planar and linear arrays of loudspeakers. 2nd Int. Symposium on Ambisonics and Spherical Acoustics, Paris, France, May 6-7, 2010 [ pdf ]
  • J. Ahrens, M. Geier, S. Spors: Perceptional Comparison of Wave Field Synthesis Implemented with Integer and Fractional Delays. DAGA, Berlin, Germany, March 15-18, 2010 [ pdf ]
  • A. Raake, C. Schlegel, M. Geier, J. Ahrens: Hör- und Konversationstests zur Untersuchung der Vorteile räumlicher Audiokonferenzen. DAGA, Berlin, Germany, March 15-18, 2010 [ pdf ]
  • Jens Ahrens and Sascha Spors: An Analytical Approach To 2.5D Sound Field Reproduction Employing Linear Distributions Of Non-Omnidirectional Loudspeakers. IEEE ICASSP, Dallas, Texas, March 14-19, 2010 [ pdf ]
  • Jens Ahrens and Sascha Spors: An Analytical Approach to 3D Sound Field Reproduction Employing Spherical Distributions of Non-Omnidirectional Loudspeakers. 4th IEEE ISCCSP, Limassol, Cyprus, March 3-5, 2010 [ pdf ]
  • Sascha Spors and Jens Ahrens: Reproduction of Focused Sources by the Spectral Division Method. 4th IEEE ISCCSP, Limassol, Cyprus, March 3-5, 2010 [ pdf ]

2009

  • Jens Ahrens and Sascha Spors: Artifacts in the Sound Field of a Moving Source Reconstructed From a Microphone Array Recording. IEEE WASPAA, New Paltz, NY, Oct. 18-21, 2009 [ pdf ]
  • S. Spors, H. Wierstorf, M. Geier, and J. Ahrens: Physical and perceptual properties of focused sources in wave field synthesis. 127th Convention of the AES, New York, NY, Oct. 9–12, 2009 [ pdf ]
  • Jens Ahrens and Sascha Spors: On the Secondary Source Type Mismatch in Wave Field Synthesis Employing Circular Distributions of Loudspeakers. 127th Convention of the AES, New York, NY, Oct. 9–12, 2009 [ pdf ]
  • Jens Ahrens and Sascha Spors: An Analytical Approach to 2.5D Sound Field Reproduction Employing Circular Distributions of Non-Omnidirectional Loudspeakers. 17th European Signal Processing Conference, Glasgow, UK, August 24-28, 2009 [ pdf ]
  • Jens Ahrens and Sascha Spors: Spatial Encoding and Decoding of Focused Virtual Sound Sources. Ambisonics Symposium, Graz, Austria, June 25-27, 2009 [ pdf ]
  • Jens Ahrens and Sascha Spors: Alterations of the Temporal Spectrum in High-Resolution Sound Field Reproduction of Different Spatial Bandwidths. 126th Convention of the AES, Munich, Germany, May 7–10, 2009 [ pdf ]
  • Jens Ahrens and Sascha Spors: Sound Field Reproduction Employing Non-Omnidirectional Loudspeakers. 126th Convention of the AES, Munich, Germany, May 7–10, 2009 [ pdf ]
  • Sascha Spors and Jens Ahrens: Spatial Sampling Artifacts of Wave Field Synthesis for the Reproduction of Virtual Point Sources. 126th Convention of the AES, Munich, Germany, May 7–10, 2009 [ pdf ]
  • Jens Ahrens and Sascha Spors: An Analytical Approach to Sound Field Reproduction with a Movable Sweet Spot Using Circular Distributions of Loudspeakers. IEEE ICASSP, Taipei, Taiwan, April 19.-24., 2009 [ pdf ]
  • Jens Ahrens and Sascha Spors: Timbral Coloration in High-Resolution Sound Field Reproduction Due to Spatial Bandwidth Limitation. Intern. Conf. on Acoustics NAG/DAGA, Rotterdam, The Netherlands, March 23.-26., 2009 [ pdf ]
  • Matthias Geier, Jens Ahrens, Sascha Spors: Binaural Monitoring of Massive Multichannel Sound Reproduction Systems Using Model Based Rendering. Intern. Conf. on Acoustics NAG/DAGA, Rotterdam, The Netherlands, March 23.-26., 2009 [ pdf ]
  • Sascha Spors and Jens Ahrens: Spatial Sampling Artifacts of Focused Sources in Wave-Field Synthesis. Intern. Conf. on Acoustics NAG/DAGA, Rotterdam, The Netherlands, March 23.-26., 2009 [ pdf ]

2008

  •  Jens Ahrens and Sascha Spors: Reproduction of Virtual Sound Sources Moving at Supersonic Speeds in Wave Field Synthesis. 125th Convention of the AES, San Francisco, CA, Oct. 2–5, 2008 [ pdf, animations ]
  • Sascha Spors and Jens Ahrens: A Comparison of Wave Field Synthesis and Higher-Order Ambisonics with Respect to Physical Properties and Spatial Sampling. 125th Convention of the AES, San Francisco, CA, Oct. 2–5, 2008 [ pdf ]
  • 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, Aug. 28-30, 2008 [ pdf ]
  • Jens Ahrens and Sascha Spors: Notes on the reproduction of moving virtual sound sources. Acoustics’08, Paris, France, June 29- July 4, 2008 (abstract only)
  • Sascha Spors and Jens Ahrens: Towards a theory for arbitrarily shaped sound field reproduction systems. Acoustics’08, Paris, France, June 29- July 4, 2008 (abstract only)
  • Katharina Bredies, Nick A. Mann, Jens Ahrens, Matthias Geier, Sascha Spors, Michael Nischt: The Multi-Touch SoundScape Renderer. Advanced Visual Interfaces, Napoli, Italy, May 28-30, 2008 [ pdf ]
  • Jens Ahrens and Sascha Spors: Focusing of Virtual Sound Sources in Higher Order Ambisonics. 124th Convention of the AES, Amsterdam, The Netherlands, May 17–20, 2008 [ pdf ]
  • Jens Ahrens and Sascha Spors: Reproduction of Moving Virtual Sound Sources with Special Attention to the Doppler Effect. 124th Convention of the AES, Amsterdam, The Netherlands, May 17–20, 2008 [ pdf ]
  • Sascha Spors, Rudolf Rabenstein, and Jens Ahrens: The theory of wave field synthesis revisited. 124th Convention of the AES, Amsterdam, The Netherlands, May 17–20, 2008 [ pdf ]
  • Matthias Geier, Sascha Spors, and Jens Ahrens: The SoundScape Renderer: A Unified Spatial Audio Reproduction Framework for Arbitrary Rendering Methods. 124th Convention of the AES, Amsterdam, The Netherlands, May 17–20, 2008 [ pdf ]
  • Jens Ahrens and Sascha Spors: Notes on Rendering Focused Directional Virtual Sound Sources in Wave Field Synthesis. 34. Jahrestagung der Deutschen Gesellschaft für Akustik, Dresden, 10. – 13. März, 2008 [ pdf ]
  • Matthias Geier, Jens Ahrens und Sascha Spors: ASDF: Ein XML Format zur Beschreibung von virtuellen 3D-Audioszenen. 34. Jahrestagung der Deutschen Gesellschaft für Akustik, Dresden, 10. – 13. März, 2008 [ pdf ]
  • Jens Ahrens and Sascha Spors: Analytical driving functions for higher order Ambisonics. IEEE Int. Conference on Acoustics, Speech, and Signal Processing (ICASSP), March 30 – April 4, Las Vegas, Nevada, 2008 [ pdf ]
  • Jens Ahrens and Sascha Spors: Reproduction of a plane-wave sound field using planar and linear arrays of loudspeakers. IEEE Int. Symposium on Communications Control and Signal Processing (ISCCSP), March 12–14, Malta, 2008 [ pdf ]

2007

  • Jens Ahrens and Sascha Spors: Implementation of Directional Sources in Wave Field Synthesis, 2007 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, October 21-24, 2007, New Paltz, NY [ pdf ]
  • Jens Ahrens and Sascha Spors: Rendering of virtual sound sources with arbitrary directivity in higher order Ambisonics. 123rd Convention of the Audio Engineering Society (AES), 2007 October 5–8 New York, NY [ pdf ]
  • Matthias Geier, Jens Ahrens, André Möhl, Sascha Spors, Jonas Loh, Katharina Bredies: The Soundscape renderer: A versatile software framework for spatial audio reproduction. Proceedings of 1st DEGA Symposium on Wave Field Synthesis, Ilmenau, Germany, Sept. 2007 [ pdf ]
  • Sascha Spors and Jens Ahrens: Comparison of Higher-Order Ambisonics and Wave Field Synthesis with Respect to Spatial Aliasing Artifacts. 19th International Congress on Acoustics (ICA), Madrid, 2-7 September 2007 [ pdf ]
  • Alexander Raake, Sascha Spors, Jens Ahrens, Jitendra Ajmera: Concept and Evaluation of a Downward-Compatible System for Spatial Teleconferencing using Automatic Speaker Clustering. ICSLP Interspeech, Antwerp, Belgium, August 27-31 2007 [ pdf ]
  • Jens Ahrens, Alexander Raake, Sascha Spors, Jitendra Ajmera: Ein rückwärtskompatibles räumliches Telefonkonferenzsystem mit automatischer Sprechergruppierung. 33. Jahrestagung der Deutschen Gesellschaft für Akustik, Stuttgart, März 2007 [ pdf ]
  • Sascha Spors and Jens Ahrens: Analysis of Near-Field Effects of Wave Field Synthesis using Linear Loudspeaker Arrays. AES 30th International Conference, Saariselkä, Finland, 2007 March 15–17 [ pdf ]

Sound Engineering

  • Steve Reich: Six Marimbas (1984). Adaptation for wave field synthesis by Jens Ahrens, 2008. Performances:
    – 124th Convention of the AES, Amsterdam, The Netherlands, May 2008
    – Lange Nacht der Wissenschaften, Berlin, Germany, June 2008