Measurement of Tonal Noise of Underwater Vehicle using Virtual Synthetic Array in Near-field

A receiving array system can be employed for a tonal noise analysis of underwater vehicles, but it is difficult to install and operate, and involves high costs. To overcome this problem, this paper proposes a method of measuring the tonal noise of an underwater vehicle through synthesizing a virtual array using a single receiver. The proposed method compensates the Doppler frequency and time delay caused by the movement of the underwater sound source, and applies a focused beamforming technique. The performance of the proposed method was analyzed through a simulation.