Filtering 50Hz frequency

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M G
M G 2011 年 3 月 7 日
Hi there,
Please could you give me a hint how I can eliminate the 50Hz frequency (electricity noise) from my eeg signals?
By FT? If so, how?
I appreciate your help.

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回答 (1 件)

Walter Roberson
Walter Roberson 2011 年 3 月 7 日
fft would be one method: fft the signal, find the bin that corresponds to 50 Hz, zero that entry (and its mirror) and ifft() back.
More commonly you would use a band-stop filter.

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