Why Does Signal Magnitude Change with 5th Order Butterworth Filter?

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SUMMARY

The discussion centers on the behavior of signal magnitude when processed through a 5th order Butterworth filter. It is established that the magnitude of the signal typically decreases due to the filter's design, which prioritizes a flat frequency response in the passband while attenuating frequencies outside this range. The degree of magnitude change is influenced by the filter's cutoff frequency and the characteristics of the input signal.

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rain2359
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hi,

May I know if we were to pass a signal into a 5th order butter worth filter, why would its magnitude decrease? Should the magnitude decrease, or it should remain the same?

thank you.
 
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