Distributed acoustic source localization experimental system based on direction finding cross locating method is constructed. First

calculate angle of sound source position through TDOA method of four-element cross array node

then fuse angle of each node by direction finding cross localization method

calculate location of sound source. Performance of direction finding crossing locating method in practical application is tested by the system.The localization error is 2. 9m when the distance between microphone and acoustic source is 50m

and when the distance is 100m

the localization error is 5. 8m. Experimental result show that direction finding crossing locating method can calculate the location of sound source accurately in practical applications and localization error increases with the distance between microphone and target.