Development of a Sound Source Localization System for Assisting Group Conversation.

In this study, we developed a sound source localization system, which consists of Jellyfish-02 and HARK robot audition software, in order to reduce the number of wires for evaluating speech duration. Sound source localization performance of Jellyfish-02 is evaluated by precision, recall, and F-measure. Performance of Jellyfish-02 is superior to conventional microphone arrays. During the experiment, we found that F-measure becomes smaller as the number of speakers increases. We investigated the percentage of speech overlapped periods in natural conversation for the purpose of examining the applicability of the system to measure speech duration in group conversation. From the results, Jelyyfish-02 surpasses conventional microphone array in design and usability. It is potentially applicable for assisting group conversion by measuring duration of speech for each participant.