أصل إشارة EEG

السكربت

nSources = 1000;              % number of small sources
srate    = 128;               % samples per second
t        = 0:1/srate:2;       % 2 seconds of time
f        = 10;                % frequency in Hz (alpha range)
phases   = 2*pi*rand(nSources, 1);
asyncSum = sum(sin(2*pi*f*t + phases), 1);
syncSum  = sum(sin(2*pi*f*t + zeros(nSources, 1)), 1);
fprintf('Peak of random-timing sum: %.0f\n', max(abs(asyncSum)));
fprintf('Peak of synchronized sum:  %.0f\n', max(abs(syncSum)));
figure;
plot(t, syncSum); hold on;
plot(t, asyncSum);
xlabel('Time (s)'); ylabel('Summed amplitude (a.u.)');
legend('Synchronized', 'Random timing');

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