The application of linear array sound intensity scaling method in underwater sound source radiated power estimation

The radiated power of underwater sound sources is difficult to obtain.In the view of this problem,by using line array sound intensity scaling method,the corresponding sound power is obtained according to the conversion relation between the beamforming output and the radiated sound power of the sound source based on the source recognition via beamforming.In order to improve the estimation accuracy of underwater sound power by linear array sound intensity scaling method,a main lobe region integration method with a certain dynamic range limitation was proposed and verified by numerical simulation.The underwater sound power estimation experiment was implemented in an anechoic water pool.The radiated sound power of single-frequency and broadband sound sources was estimated at different measuring distances for dual underwater sources.The measurement results of reverberation method were taken as the reference value of radiated sound power.The variation of the estimation error with the influence factors,such as the frequency of the sound source and the measuring distance was studied.The experimental results show that the maximum estimation error of both single-frequency and broadband sound sources does not exceed 2.6 dB and does not exceed 1.6 dB at high frequencies,which indicated the correctness and feasibility of the linear array sound intensity scaling method for estimating the radiated sound power of underwater sound sources.