Sound localization system by simple analog–digital circuits based on the biological auditory system

We proposed in this study the simple system for detecting the sound localization based on the biological auditory system. The proposed system is constructed with the simple complementary metal oxide semiconductor (CMOS) analog–digital circuit based on the biological auditory system and two microphones. The proposed circuit consists of the delay lines and the comparators. The structure of the proposed circuit is simple. The test circuit and system were developed. The test circuit was fabricated with discrete metal oxide semiconductor (MOS) transistors on the breadboard. The experimental results of the test system showed that the proposed circuit can generate the output signal for detecting the position of the sound of the target. We can realize a new target tracking system by applying the proposed system in this research.