A study of a voice evacuation guidance system using a precedence effect

Abstract

We have developed a voice evacuation guidance system using a precedence effect when a fire breaks out in a building in order to guide refugees to safe place efficiently. This system has already applied to an underground shopping center which has a space like a straight path as an aggressive evacuation guidance system. Further, a method for adapting this system to large interior space is examined and the effectiveness of this system have been identified basically. As a goal of this research, it was intended to develop a highly accurate acoustic design method for designing the voice evacuation guidance system. For realizing this, it is necessary to clarify relationship between acoustic conditions and a sound direction recognition in this system and create a database of these relationship. In this report, as one of important factors of developing this system, we performed an experimental measurement in relation to a recognition time of a composed sound by a preceding sound and a secondary sound. It was studied in particular detail for the secondary sound coming from various angles relative to the preceding sound.