The hydrophone array is generally used for holography data acquisition when material sound reflection coefficient is measured by near-field acoustic holography（ NAH） method. Aiming at effects of amplitude between channels of array unit and phase consistency on holography reconstruction results

simulation analysis is carried out in different scanning conditions. According to the simulation results

it is recommended that the measurement should be interlaced scanning in the same holography plane by the hydrophone array. The amplitude and phase inconsistencies of the hydrophone channels are calibrated by the couple cavity method

and then the sound reflection coefficient of a rectangular plate is measured in the anechoic tank. The data processing results show that the hydrophone reconstruction precision is improved after the holography array is calibrated by the couple cavity method.