A passive acoustic localization system is designed that is centered on TMS320F2812 digital signal processor in base of cross correlation time delay estimating algorithm.Using its owing characteristic of both digital signal processor and micro-controller

the chip structure design is simplified and systematic processor ability is improved.A target localization is realized on the basis of accomplishing multi-path audible signal synchronous acquisition

storage and data processor.The result indicates by measurement that system in distance of 25 m×25m in the flat surface range

target localization time is within 2 s and angle error is smaller than 2.7 %

reaches the real time target localization.