Hey! There is someone at your door. A hearing robot using visual communication signals of hearing dogs to communicate intent. - Kheng Lee Koay; Gabriella Lakatos; Dag Sverre Syrdal; Márta Gácsi; B. Bereczky; Kerstin Dautenhahn; Ádám Miklósi; Michael L. Walters (ALIFE, 2013)