How to make noise reduction work in pulseaudio?

Question

PulseAudio

The task is to write sound from the built-in laptop microphone with an acceptable noise level.
I set up everything that is possible, in particular, according to the manual here on Habré (similar settings are given in other places). Visually, everything should work - a new device appeared and all that. But there is no difference in the record "before" and "after".