Abstract: A 3-D noise source locating scheme is proposed based on the beam-forming and superposition method of sound wave. With the traditional wave-beam forming technique as basis, the scheme identifies the 2-D distribution of noise source on sound image plane through the sound pressure measurement of microphone array. With the sound source coordinate of 2-D sound image as the initial position of equivalent source of wave superposition and the sound pressure error of reconstructed microphone array as evaluation indicator, the 3-D spatial coordinate and intensity of sound source are searched out by using genetic algorithm. Test results show that the scheme proposed can accurately identify the 3-D coordinate of noise source and effectively suppress the interference of fake noise source caused by side-lobe effects in wave-beam forming

Key words: noise source 3-D locating; wave-beam forming; wave superposition method; microphone array