Conversacube is the work od designer Lauren McCarthy, it is a cube which runs on Arduino and it include a range of IR sensors, some electret microphones which are used for detecting presesnce and measuring audio levels in conversations.
Don’t know the right thing to say? Stumbling over words? Do away with uncomfortable conversation. Conversacube is a conversation aid device that will prompt you what to say and do and guide everyone toward smooth, comfortable conversation every time.
You can find out more details about the Conversacube over at the designers website.