This addon removes the NPC counter from the bottom right corner of the minimap, and the beeping sound when an NPC enters or leaves your range.
If you want to remove the sounds only, take a look at this mod: Disable NPC Detector Beep or copy only the sounds folder. Credit goes to denmonari for the sound files.
This addon is compatible with Sky Reclamation Project (SRP) and it should be compatible with most other mods too.
Installation:
Copy the downloaded gamedata folder to the root S.T.A.L.K.E.R. Clear Sky folder. If existing files would be overwritten, use the config editing method mentioned below.
If you want to remove the NPC counter yourself, change the x or y values in the gamedata/configs/ui/zonemap.xml and zonemap_16.xml right after the "<static counter" text. I just set it to negative of the original value of x, so the entire NPC counter box is off-screen.