Abstract
Magnetic recording and/or analog-to-digital conversion add noise to the data. This paper describes a method for reducing the noise added to EEG data by recording and digitizing. A linear filter is described which pre-emphasizes the EEG before recording or digitizing; a second filter then recovers the original signal after playback. The technique can result in a factor of 10 (20 dB) improvement of the signal-to-noise ratio of high frequency EEG components.
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