Design concept of a human-like robot head

For humanoid robots able to assist humans in their daily life, the capability for adequate interaction with human operators is a key feature. If one considers that more than 60% of human communication is conducted non-verbally (by using facial expressions and gestures), an important research topic is how interfaces for this non-verbal communication can be developed. To acieve this goal, several robotic heads have been designed. However, it remains unclear how exactly such a head should look like and what skills it should have to he able to interact properly with humans.