Some Improvements in the Measurement of Variable Latency Acoustically Evoked Potentials in Human EEG
Gerhard H. Steeger, Otto E. Herrmann, M. Spreng · IEEE Transactions on Biomedical Engineering · 1983
Since averaging of acoustically evoked potentials of variable latency yields inconsistent estimates, we tried to improve the results by applying Woody's adaptive filter [8], a weli-known template-cross-correlation method. However, the results were worse and obviously less reliable than those reported by Woody. The following reasons for this behavior were found: 1) low signal-to-noise ratio and 2) large coincidences in the spectral components of EEG and of acoustically evoked potentials, enabling erroneous synchronizations of evoked potential-like EEG transients.