ratana103/QRS-complex-detection-and-heart-disease-classifier-using-ECG-signal-processing

Usually for ECG signal, the frequency range over 80Hz is noise. So first we need to remove this high frequncy part Next, in ECG signal, there is also one critical noise that is called POWER LINE NOISE Since every electrical device is based on the power line of your grid (in your country 50Hz? or 60Hz). Because of this, in biometric signals like ECG or EEG based on this grid power, there is always noise of 50Hz(or 60Hz , it depends on country) So that by using notch fileter for 50Hz, we can remove this noise