TU Berlin

Quality and Usability LabJens Ahrens

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Dr.-Ing. Jens Ahrens

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Research Field:

Spatial audio capture and presentation

Research Topics:

  • Physical fundamentals and system theory of sound field synthesis
  • Modeling for head-related transfer functions
  • Psychoacoustics of synthetic sound fields
  • Object-oriented representation of spatial audio scenes
  • Interaction with spatial audio scenes
  • Beamforming
  • Orthogonal sound field decomposition


Biography

As of May 2016, Jens Ahrens is with Chalmers University of Technology.


Jens Ahrens received a Diploma in Electrical Engineering/Sound Engineering (equivalent to Master of Science) 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 both with distinction. From 2006 to 2011 he was member of the Audio Technology Group at the Quality and Usability Lab 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. In the fall/winter terms 2015/16, he was Visiting Scholar at Stanford University. He received the literature award 2013 of the Information Technology Society (ITG at VDE). Find more information here.

 

Teaching

 Sprechstunde nach Vereinbarung per E-Mail.

 

Projects



Address

Quality and Usability Lab
Deutsche Telekom Laboratories
TU Berlin
Ernst-Reuter-Platz 7
D-10587 Berlin, Germany
Tel:  +49 30 8353 58461
Fax: +49 30 8353 58409

Contact information

jens.ahrens@chalmers.se

Publications

The ventriloquist effect evokes changes in the early spatial processing of auditory stimuli as measured by the mismatch negativity
Zitatschlüssel kelvasa2015a
Autor Kelvasa, Daryl and Ahrens, Jens and Antons, Jan-Niklas
Buchtitel 7th Mismatch Negativity Conference. Error Signals from the Brain
Seiten 83
Jahr 2015
ISBN 978-3-00-050311-5
Workshop Yes
Ort Leipzig, Germany
Adresse Leipzig, Germany
Monat sep
Notiz Electronic, Online
Verlag University of Leipzig
Serie MMN
Wie herausgegeben Full
Zusammenfassung The Ventriloquist Effect arises when synchronous auditory and visual events occur with spatial discrepancy and the location of the visual event biases the perceived location of the auditory event. The mismatched negativity (MMN) has been shown to be effective in tracking changes in spatial location of both auditory and visual stimuli by examining peaks of standard and deviant difference waves occurring within 200 ms after stimulus presentation. We present an audio visual MMN experiment in which we attempt to induce an auditory MMN by shifting only the location of the visual stimulus. The standard condition consisted of visual and auditory stimuli originating from 0°, -10°, and 10°. The deviant condition held the auditory stimulus in the same location while shifting the visual stimuli to -20° and 20°, 10°, and 10° respectively. Auditory stimuli were presented by a software system for spatial audio reproduction that created two dimensional virtual acoustic scenes and employed head tracking for added robustness. In addition, auditory and visual only conditions were collected to serve as comparisons to the audio visual difference waves. An auditory MMN was successfully induced in the peripheral audio visual condition, supporting other findings that cross-modal processing can illicit changes in the early pre-attentive processing of stimuli.
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