Abstract:To improve the accuracy and antijamming capability of the gas pipeline leakage location, a twostep method based on crossspectral beamforming with exclusion of autospectral is proposed by using linear array. A series of tests are implemented toanalyze the performance of leakage location andvelocity estimationfor Melement (M=3, 5, 7)arrays and the subarrays.Thedifferentantijamming capability among those threearraysare discussed.Experimentalresults showthat the4kHzcomponentofleakagesignalis lessinfluenced bymultipath and its velocity is in the range of 1 600 m/s ～1 700 m/s. Compared with the 2element and 4element subarrays, the 6element subarray has better velocity estimation stability and antijamming capability. Location accuracy and antijamming capability of the 7element array are also better. When the interference is small, mean errors of location results at multiple leakage positions are less than 1% by utilizing 7element array. Under the SNR of -15 dB, mean errors of 7element array are remained less than 2%. Furthermore, location cannot be completed by using the existing acoustic method that is based on generalized cross correlation analysis under noise condition. This study applies the array technique on pipeline leakage location and the performance of location method is enhanced.