Finding high and low frequency noise....

Is power line interference high frequency noise in ecg and base line wandering low frequency noise in ecg? Is both the noise present in EMG and EEG signal?

[Image Analyst]

Is this a MATLAB programming question? Or a physics question?

[Tinkul]

it is biomedical signal processing question..

[Image Analyst]

OK, but do you have a MATLAB question for this MATLAB forum? If you do, attach your m-file. http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

Answer 1

[Star Strider]

Powerline noise can appear in poorly-instrumented EMG and EEG signals. The usual way to deal with this in hardware is to have a good subject reference ground, no ground faults (patient ground and instrument ground are the same), and to use shielded cables.

You can get rid of the 50-60 Hz noise in the recorded signal using a digital notch filter. Baseline wandering is usually dealt with by using an appropriately-designed bandpass filter.