A listener is a person who, regardless of his desire, receives certain signals and transmits them in acoustic form to others. The priestesses of parthogenesis also had the ability to receive similar signals: “In the middle of the square, the listener stood upright waist-deep in the grass, shrouded in a lilac cloud, with raised palms, with glassy eyes and foam on his lips. Curious children crowded around him, looked and listened with their mouths open - they never got tired of this sight. Candide also stopped to listen, and the children were blown away like the wind. “New ones are entering the battle,” the Hearer raved in a metallic voice. “Successful movement... Vast places of peace... New squads of girlfriends... Calm and merging...” ("Snail on the Slope", Arkady and Boris Strugatsky).