Abstract: In this paper we discuss the acoustic behaviour of an uniform pipe array, one end of which is connected with an infrasonic transducer, and the other is terminated with an acoustic impedance. We give a theoretical analysis and show how to compute the response to a fluctuating pressure at any one inlet port of the pipe array. We also show what influence of the impedances in the terminal of the array and in the transducer on its response. Then we use these results to calculate its frequency and phase response and directivity when a plane sound wave passes across the array. The pipe array is used for detection of infrasonic or gravity waves, in the wind noise. We suggest a model of noise generated by wind. We computed the average power spectrum density function and the coherence of this noise model. Taking the theoretical analysis of the pipe array, we represent the improvement of the signal-to-noise ratios of infrasonic waves in the wind background, and give the results by a numerical example obtained by means of computer, programs. We can find the significant improvement in period range 1-100 sec.. And we compare it with experiments.