Time - Varying Filtering Average of Auditory Evoked Potential
Sichang Jiang · 2003
Most of the evoked potentials have time varying characteristic. The response is transient and its response spectral is varying during the response period. The key point of the time - varying filtering method is that the filter varies as the response changes, so it can get the signal effectively and raise the signal to noise ratio. In present report, we compared these two methods, and our result shows that the raise of signal to noise ratio is significant by using the time - varying filtering method. This technique can reduce the background noise and repetitions, and the waveform is clearer than that of usual average.