Deterioration of average evoked potential waveform due to asynchronous averaging and its compensation

The deterioration of the average due to the asynchronous sampling of evoked potential data is discussed. The asynchronous averaging in the frequency domain is analyzed, and a relationship between the fluctuating time and the degree of the deterioration is derived. By using this relationship, a required sampling rate is derived to ensure the accuracy of the averaging. In the case of coarse sampling, a compensation procedure for the asynchronous averaging is deduced, by which the compensated signal approaches the original signal as the number of averagings increases.<
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