We have designed an experimental method for three-dimensional sound source localization using the attenuation law of sound intensity.Sound localization is mainly achieved by measuring the distance,direction,and height of the sound source relative to the exploration center. Using the principle of logarithmic attenuation of sound intensity ratio,the relationship between the attenuation law of sound intensity in air and the distance from the sound source was derived;A angular displacement method was designed to measure the direction of sound sources,and the relationship between the magnitude of angular displacement and the time when the sound intensity ratio reaches its peak was given;The height of the sound source to the horizontal plane of the reference platform was measured using an electronic control lifting platform. And a three-dimensional sound source positioning experimental device was made within a range of 1 cubic meter. The experimental results showed that the maximum relative error of the sound source distance measurement in the two-dimensional plane was 2.3％,and the maximum error of the azimuth measurement was 1.6°;In three-dimensional space,the maximum relative error of sound source distance measurement is 2.9％,the maximum relative error of height measurement is 4.9％,and the maximum error of azimuth measurement is 0.8°. It has been proven through experiments that the positioning effect of this experimental system is good.
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