incomprehensible sounds as the game progresses (Wasteland 3)

During the game I constantly hear some metal sound, for example when approaching the palace of the patriarch, also drew attention to this sound in the location of the mine for the extraction of mineral dyes. There is an antenna next to the cave, if it will approach the same sound, you can fix the antenna and go to the house on wheels, then there will be some signal type of morsel code and all, I have a red square in the center of the elbow changes to the green if you go there, and one member of the group to leave at the antenna. What's it?