Abstract: Wind noise at the surface of the Earth limits the detection of infrasonic waves with periods greater than 10 s. For infrasonic arrays designed to improve the signal-to-noise ratios of the infrasonic waves, it is usually assumed that the background noise due to wind turbulence is incoherent between the array elements.
The principle and the technique for designing the infrasonic array are presented, the calibration method of the array is described in detail and the experiment results are given in this paper.
From a large amount of statistical data, we get the result improving a signal-to-noise ratio of 12dB for the infrasonic array.