How to prevent pulseauido from changing the microphone level?

Question

linux

Pulseaudio randomly increases Mic boost to 100%. I set it to, say, 52%, and after a while it becomes 100% again. How to solve the problem ?
System: Ubuntu 14.04.1 LTS x86_64
Kernel: 3.13.0-43-generic
DE: Unity
Built-in sound card: HDA Intel PCH
Built-in microphone.
Skype is not even running, and it has a ban on changing the microphone volume. This problem exists only on Ubuntu, I looked at Xubuntu, Lubuntu, Mint - everything is in order there, the volume does not change.
I want to note that the Internal Mic Boost is changing.
Here are the settings that I set:

This is how they become after a while:

If you set the settings in the standard Ubuntu volume control, then the same thing happens.

Answer 1

He never did this, maybe you have Skype configured to adjust the volume of the microphone?

Answer 2

Here everything is very beautifully stated: https://nzeid.net/pulseaudio-disable-auto-volume
You can copy-paste the first three commands without delving into it. But if you get smart with these values, you can flexibly customize it for yourself.