SONIFIED EPILEPTIC RHYTHMS
Authors: Gerold Baier, Thomas Hermann, Sven Sahle, Helge Ritter
Int. Conf. on Auditory Display (ICAD 2006), submitted
We describe techniques to sonify rhythmic activity of epileptic
seizures as measured by human EEG. Event-based mapping of parameters is
found to be informative in terms of auto- and cross-correlations of the
multivariate data. For the study, a group of patients with childhood
absence seizures are selected. We find consistent intra-patient
conservation of the rhythmic pattern as well as inter-patient
variations, especially in terms of cross-correlations. The sound
synthesis is suitable for online sonification. Thus, the application of
the proposed sonification in clinical monitoring is possible.
Download: BaierHermannSahleRitter2006-SER.pdf (available soon)
- Example S1: S1 (mp3, 384k)
Event-based sonification of time series from electrode F4 (left channel, fundamental frequency 100 Hz) and T4 (right channel, ff 150 Hz) during absence seizure. 6-fold reduction of speed compared to real-time.
- Example S2: S2 (mp3, 412k)
Sonification as in S1, except speed is real-time.
- Example S3: S3 (mp3, 372k)
Sonification as in S2 of another segment of EEG with absence seizure from the same patient.
- Example S4: S4 (mp3, 300k)
Sonification as in S2, except that electrode T4 is replaced with F3 (contra-hemispheric to F4).
- Example S5: S5 (mp3, 396k)
Sonification as in S2 with subclinical epileptiform activity from another patient. Electrodes used are C4 and T4.
modified 2006-02-07 Thomas Hermann