The Sonification of Human EEG and other Biomedical Data

Thomas Hermann

Dr. Thomas Hermann received a Master's Degree (German Diplom) in Physics 1997 from Bielefeld University. He joined the Neuroinformatics Group of Prof. Helge Ritter at the Faculty of Technology, Bielefeld University, where he started research on sonification for exploration and process-monitoring of high-dimensional data. In 1998 he became a member of the Graduate Program Task-Oriented Communication. He received a Ph.D. with the thesis Sonification for Exploratory Data Analysis in 2002, and is currently continuing his research as research assistant with a focus on interactive multi-modal human-computer interfaces and techniques for multi-modal data exploration.

Thomas Hermann is member of the ICAD board of Directors, organiser of the first international workshop on Interactive Sonification (2004) and guest editor of IEEE Multimedia for a special issue on "Interactive Sonification" (the latter two together with Andy Hunt), German delegate of the EU COST action 287 (ConGAS, Gesture Controlled Audio Systems). He gives lectures and seminars on Neural Networks, Data Mining, Sound Synthesis, Sonification, Computer Music, and Auditory Display. He planned and developed the Bielefeld iLab (Interaction Lab) where visual, tactile and auditory displays are combined for multi-modal data exploration.

Selected Recent Publications

  1. T. Hermann, H. Ritter, (2005). Model-based Sonification Revisited - Authors' Comments on Hermann & Ritter 2002, ACM Transaction on Applied Perception, vol. 2, nr. 4, pp. 559-563, ISSN: 1544-3558.
  2. T. Hermann, H. Ritter, (2005). Crystallization Sonification of High-dimensional datasets, ACM Transaction on Applied Perception, vol. 2, nr. 4, pp. 550-558, ISSN: 1544-3558.
  3. T. Hermann, A. Hunt, (2005). An Introduction to Interactive Sonification, Guest Editors introduction, IEEE Multimedia Special Issue on Interactive Sonification, April 2005, vol. 12, nr. 2, pp. 20-24.
  4. P. Meinicke, T. Hermann, H. Bekel, H. Müller, S. Weiss, H. Ritter, (2004). Identification of Discriminative Features in EEG, Journal for Intelligent Data Analysis, 8, (1), pp. 97-107.
  5. T. Hermann, H. Ritter, (2004). Sound and Meaning in Auditory Data Display, Invited Paper for Proceedings of the IEEE, Special Issue Engineering and Music - Supervisory Control and Auditory Communication, 92, (4), pp. 730-741.
  6. G. Baier, T. Hermann, M. Müller. (2005). Polyrhythmic Organization of Coupled Nonlinear Oscillators, International Symposium on Non-visual & Multimodal Visualization, London.
  7. T. Hermann, P. Meinicke, H. Bekel, H. Ritter, H. Müller, S. Weiss, (2002). Sonification for EEG Data Analysis, Proc. Int. Conf. on Auditory Display (ICAD 2002), Kyoto, Japan, pp. 37-41.
  8. T. Hermann, G. Baier, M. Müller, (2004). Polyrhythms in the Human Brain, contribution to the "Listening to the Mind Listening" Concert of Sonifications at the Sydney Opera, July 2004.
  9. T. Hermann, (2002). Sonification for Exploratory Data Analysis, Ph.D. thesis, Bielefeld University, Bielefeld, pdf available online, see link below.

[More detailed references and a full list of publications].


Gerold Baier

Prof. Dr. Gerold Baier received his PhD in 1989 from the University of Tübingen, Germany. He is full professor of biophysics (tenure) at the University of Morelos, Cuernavaca, Morelos, Mexico. Currently he works on the nonlinear dynamics, the analysis and the sonification of Human EEG with emphasis on epilepsy.

Recent Publications

  1. G. Baier and T. Hermann, The Sonification of Rhythms in Human Electroencephalogram. Proceedings of ICAD 2004, July 6-9, Sydney (2004).
  2. T. Hermann, G. Baier and M. Müller, Polyrhythm in the Human Brain. Proceedings of ICAD 2004, July 6-9, Sydney (2004).
  3. T. Hinterberger, G. Baier, J. Mellinger and N. Birbaumer, Auditory Feedback of Human EEG for Direct Brain-Computer Communication. Proceedings of ICAD 2004, July 6-9, Sydney (2004).
  4. G. Baier and M. Müller, The Nonlinear Dynamic Conversion of Analog Signals into Excitation Patterns. Phys. Rev. E 70, 037201 (2004).
  5. G. Baier and M. Müller, Frequency-Selective Induction of Excitation Waves near Sub- and Supercritical Hopf Bifurcation. Phys. Lett. A 330, 350 (2004).
  6. G. Baier and M. Müller, Excitable Chaos in Diffusively Coupled FitzHugh-Nagumo Equations. Rev. Mex. Fís. 50, 422 (2004).
  7. T. Hinterberger and G. Baier, POSER: Parametric Orchestral Sonification of EEG in Real-time for the Self-Regulation of Brain States. IEEE Trans. Multimedia 12, 70 (2005).
  8. M. Müller, G. Baier, A. Galka, U. Stephani, and H. Muhle, Detection and Characterization of Changes of the Correlation Structure in Multivariate Time Series. Phys. Rev. E 71, 046116 (2005).
  9. G. Baier, T. Hermann, O.M. Lara, and M. Müller, Using Sonification to Detect Weak Cross-correlations in Coupled Excitable Systems. Proceedings of the 13th International Conference on Auditory Display 2005, July 6-9, Limerick (2005).
  10. G. Baier, T. Hermann, and M. Müller, Polyrhythmic Organization of Coupled Nonlinear Oscillators. Second International Conference on Nonvisual and Multimodal Visualization 2005, July 4, London (2005).
  11. G. Baier, A. Ramírez, I. Amaro and M. Müller, Local Induction of Spatio-temporal Chaos. Rev. Mex. Fís. (2005) in press.
  12. A. Chernihovskyi, F. Mormann, M. Müller, C.E. Elger, G. Baier, K. Lehnertz, EEG Analysis with Nonlinear Excitable Media. J. Clin. Neurophysiol. 22, 314 (2005).


G. Baier, Rhythmus (Rhythms), Rowohlt, Reinbek (2001). Including Audio CD by S. Sahle and G. Baier with 16 sonifications of physiologic rhythms and artificial data sets. Examples: Human heartbeat (regular, tachycardia, fibrillation); human growth hormone (normal, patient with acromegaly, cytosolic calcium in hepatocytes (liver cells), single nerve cell spiking, EEG of child with petit mal epileptic seizure.