Spatiotemporal approach for passive sound source localization - real-world experiments

Summary form only given. An approach to consider propagation time delay in sound source localization is tested using recorded data. Sound sources can be localized with a network of acoustic sensor stations. Each sensor station is a subsystem calculating direction of arrival of a dominant sound source in their audibility range. The finite propagation speed from a sound source to a sensor station has to be considered in localization. In a network based localization, the reception time of acoustic events is usually different at each sensor station. The difference has to be considered while combining the information of spatially separate sensor stations. If the difference is neglected, it may result in deteriorated location estimation. The results obtained with recorded data show that the spatiotemporal approach is able to take into account the propagation delay and thus compensate the fact that the sensor stations receive the information at different times.