A research team at Japan's Kagawa University has developed a robot that's able to "speak" like a human being. While talking robots are not new, but this one is different, as this model isn't using software but a set of mechanical, human-like vocal organs made of silicone, for example "artificial vocal chords" or a "tongue" and "lips".
The key element to make the robot speak like a human is an air compressor: the robot uses a set of pressure and control valves, eight resonance motors, and a resonance tube (the throat) to convert airflow into sounds. Those sounds are then recorded via a mic, collected and passed on to be processed by a computer to make them as human-like as possible.
More Info: Kagawa