There are many types of negative states in "Stalker 2: Heart of Chernobyl". Mental radiation is one of the rarer negative states. Mental radiation is generally caused by controller mutants and Caused by a psychic beacon that releases psychic radiation.
How to recover from mental radiation in STALKER 2: Heart of Chernobyl
Psychically irradiated states are usually caused by Controller mutants and Psychic Beacons that emit psychic radiation.
The specific effect is to produce strange sounds and ghostly hallucinations, gradually draining health points.
The solution to the problem is to eliminate the controller to remove the effect, or to turn off the mental beacon. SEVA-I armor and Psi-Block (+10 Psi protection for 1 minute) can mitigate the effects of psychic radiation.