Monitoring electrical activity
AssigneeThe University of Bristol
InventorsMark James Griffiths, Alan W Preece
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Abstract
A method and apparatus for monitoring electrical activity, such as brainwaves, in an animal comprising detecting said activity to produce a corresponding output signal, combining the output signal with a random noise signal to produce a modified signal, and analyzing the modified signal using an autocorrelation technique to detect the relative power density values at a plurality of different frequencies. The random noise signal may be a random number. The autocorrelation technique may involve the Yule-Walker method.
Claims28
A method of monitoring electrical activity in an animal comprising detecting said activity to produce a corresponding output signal, combining the output signal with a random noise signal to produce a modified signal, and analyzing the modified signal using an autocorrelation technique to detect the relative power density values at a plurality of different frequencies.
Apparatus for monitoring electrical activity in an animal comprising a detector to produce an output signal corresponding to the electrical activity, a random noise generator to produce a random noise signal, and a processor to combine the output signal and random noise signal to produce a modified signal and to analyse the modified signal using an autocorrelation technique to detect the elative power density values at a plurality of different frequencies.
Dependencies are inferred from the claim text.