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user 58718
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Butterworth filter cutoff attenuation is not exactly 0.707(-3dB)
The documentation of scipy Butterworth filter says its cutoff attenuation is 0.707(-3dB). To validate this, I created a square wave signal, performed FFT and implemented a bandpass filter with a band …
- 143
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Accepted
Butterworth filter cutoff attenuation is not exactly 0.707(-3dB)
Filter needs time to settle down. This settling process altered the beginning of time domain data and created the small difference. I took the second half of time domain filtered data and got a ratio …
- 143