Speaker Localization Based on Phase Detection of Vowel Fundamental Frequencies

Abstract

Research on human-robot interaction has recently been getting an increasing amount of attention. In the research field of human-robot interaction, speech signal processing in particular is the source of much interest. In this paper, we present experiment of speaker localization using a microphone array and an ITD (Interaural Time Difference) method which finds the sound source by phase shift of two signals. Band pass filters are designed to get vowel fundamental frequencies. Phase sensitive detectors are applied to measure the phase differences of voice signal of different microphones. All circuits are constructed by FPAA (field programmable analog array). The proposed system can output speaker location in real-time with low power.