ToolPythonIntermediate
Filtering with scipy.signal: mains hum and noise out of an ECG
- sos_N = signal.butter(N, 40, fs=fs, output="sos")
- sos = signal.butter(4, 40, fs=fs, output="sos")
- f"designed at 45 Hz {f_3dB(signal.butter(4, 45, fs=fs, output='sos')):.1f} Hz")
- s = signal.sosfiltfilt(signal.butter(N, 40, fs=fs, output="sos"), step)
- signal.butter(4, 40)
- w, h = signal.freqz_sos(signal.butter(4, 40 / fs, output="sos"), worN=8192, fs=fs)