|The author is now development new sound localization method, double Acoustic Holography (DNAH) method. This method is a converted method of conventional Nearfield Acoustic Holography (NAH) method. In proposing method, the measurement plane in measurement process is doubled. In this paper, the theory of proposing method is explained. And to verify the performance of proposing method, the numerical simulations at various frequencies below 100㎐ are done. In conclusion, the proposing method shows better result at each frequency.