Basic study on detection of moving sound source on propagation path with barriers

Abstract

The directional detection of sound sources using frequency modulation generated by radiated sound from moving sound sources has been investigated. It has been shown that direction detection is possible when there is no acoustic phenomenon such as reflection and diffraction. In a sound field where barriers exist on the propagation path of the radiated sound, it is difficult to detect the direction of a moving sound source. Numerical simulation can be used to analyze such sound field characteristics. In this paper, we investigate the possibility of detecting the direction of a sound source in a space where barrier is placed on the propagation path of sound generated by a moving sound source. When the sound source is visible from the observation point, the direction of the sound source is detected. Otherwise, the direction of the edge of the barrier, which is the diffraction point, is detected.