This infected is hypersensitive to sound and can be considered a
clairaudient. Unlike the clicker this infected has access to his sight.
The Doppler is a walking radar; the fungus tentacles inserted into his
eyes are connected to his auditory cortex and allows him to actually see sound-wave vibrations. He also has highly sensitive cordycep
extensions growing out of his ears that are adjacent to a fungal cap around his
head that acts as a resonator. This allows the Doppler to hear a pin drop from
a mile away. When he detects you, the Doppler will charge towards you and send
out a loud screech increasing in frequency as he approaches you. Making him
worthy of the name. This will also warn
other nearby infected.
Even if you manage to sneak up behind him, the spore hairs growing out of his back grants him the ability to detect the slightest vibrations and alerts the Doppler of incoming movement.
The Doppler should be feared because even if you try to run away and
hide. He will “see” you through the walls.