The exterior part becomes the lower half of the aibo's head. There are microphones for voice recognition inside. The microphones are located in the blue areas with transparent plastic parts. The right side of the photo is the front side of the aibo's head. In other words, the aibo has two microphones on the left side of the head and one microphone on the right side. And there is another microphone above the three microphones. The four microphones enable to three-dimensionally detect the direction of voice.