Supplementary Material for "Event-based sonification of EEG rhythms in real time"

Baier G, Hermann T, Stephani U (2007)
Bielefeld University.

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Abstract
+ OBJECTIVE: To introduce a sound synthesis tool for human EEG rhythms that is applicable in real time. + METHODS: We design an event-based sonification which suppresses irregular background and highlights normal and pathologic rhythmic activity. + RESULTS: We generated sound examples with rhythms from well-known epileptic disorders and find stereotyped rhythmic auditory objects in single channel and stereo display from generalized spike-wave runs. For interictal activity, we were able to separate focal rhythms from background activity and thus enable the listener to perceive its frequency, duration, and intensity while monitoring. + CONCLUSIONS: The proposed event-based sonification allows quick detection and identification of different types of rhythmic EEE events in real time and can thus be used to complement visual displays in monitoring and EEG feedback tasks. + SIGNIFICANCE: The significance of the work lies in the fact that it can be implemented for on-line monitoring of clinical EEG and for EEG feedback applications where continuous screen watching can be substituted or improved by the auditory information stream.
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This Supplementary Material for "Event-based sonification of EEG rhythms in real time" is made available under the Open Database License: http://opendatacommons.org/licenses/odbl/1.0. Any rights in individual contents of the database are licensed under the Database Contents License: http://opendatacommons.org/licenses/dbcl/1.0/
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Baier G, Hermann T, Stephani U. Supplementary Material for "Event-based sonification of EEG rhythms in real time". Bielefeld University; 2007.
Baier, G., Hermann, T., & Stephani, U. (2007). Supplementary Material for "Event-based sonification of EEG rhythms in real time". Bielefeld University.
Baier, G., Hermann, T., and Stephani, U. (2007). Supplementary Material for "Event-based sonification of EEG rhythms in real time". Bielefeld University.
Baier, G., Hermann, T., & Stephani, U., 2007. Supplementary Material for "Event-based sonification of EEG rhythms in real time", Bielefeld University.
G. Baier, T. Hermann, and U. Stephani, Supplementary Material for "Event-based sonification of EEG rhythms in real time", Bielefeld University, 2007.
Baier, G., Hermann, T., Stephani, U.: Supplementary Material for "Event-based sonification of EEG rhythms in real time". Bielefeld University (2007).
Baier, Gerold, Hermann, Thomas, and Stephani, Ulrich. Supplementary Material for "Event-based sonification of EEG rhythms in real time". Bielefeld University, 2007.
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Description
Sonification of background activity in recording Fz-Cz in patient 1. Data displayed in Fig. 2, top; waveform W and spectrogram in logarithmic scale in Fig. 2, center and bottom.
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2016-03-24T10:07:43Z
Description
Background and absence seizure in patient 2, channel T4 as in Fig. 3, top. Waveform and spectrogram in Fig. 3, center and bottom.
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Last Uploaded
2016-03-24T10:07:43Z
Description
Background and absence seizure in patient 2, channels T4 (left) and F4 (right) in stereo panning starting from second 20 in Fig. 3. Oscillator frequency is 200 Hz for channel T4, and 300 Hz for channel F4. Waveform and spectrogram in Fig. 4, top and bottom.
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Last Uploaded
2016-03-24T10:07:43Z
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Sonification of focal activity in Fz-Cz in patient 1. Data displayed in Fig. 5 (top, lower trace). Waveform and spectrogram in Fig. 5, center and bottom.
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Last Uploaded
2016-03-24T10:07:43Z
Description
Interictal focal activity in patient 1 with improved rhythm/background ratio in (Fz-Cz)-(Cz-Pz). Sonification of two consecutive transients. Data in Fig. 6 (top); waveform and spectrogram in Fig. 6, center and bottom.
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OA Open Access
Last Uploaded
2016-03-24T10:07:43Z
Description
Interictal focal activity in patient 1 with improved rhythm/background ratio and quadratic mapping of the number of harmonics. Sonification of a longer segment with various transients. Waveform and spectrogram in Fig. 7, top and bottom.
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OA Open Access
Last Uploaded
2016-03-24T10:07:43Z
Description
Seven glued together segments of interictal focal activity in patient 1. Improved rhythm/background ratio and quadratic mapping of the number of harmonics. Sonification as in Sound 6 but with three channel stereo display: (Fz-Cz)-(Cz-Pz) (middle); (C3-F3)+(C4-F4) (right); -(P3-O1)-(P4-O2) (left). Waveform and spectrogram in Fig. 8, top and bottom.
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OA Open Access
Last Uploaded
2016-03-24T10:07:43Z
Description
Background and transition to seizure activity in patient 1. Data in Fig. 9; waveform and spectrogram in Fig. 10, top and bottom.
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OA Open Access
Last Uploaded
2016-03-24T10:07:43Z

This data publication is cited in the following publications:
2017102
Temporal Perspective from Auditory Perception
Baier G, Hermann T (2008)
In: Simultaneity: Temporal Structures and Observer Perspectives. Vrobel S, Rössler OE, Marks-Tarlow T (Eds);Singapore: World Scientific: 348-363.
2017129
Event-based sonification of EEG rhythms in real time
Baier G, Hermann T, Stephani U (2007)
Clinical Neurophysiology 118(6): 1377-1386.
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