Steering Acoustic Intensity Estimator Using a Single Acoustic Vector Hydrophone

Abstract

Azimuth angle estimation using a single vector hydrophone is a well-known problem in underwater acoustics. In the presence of multiple sources, a conventional complex acoustic intensity estimator (CAIE) cannot distinguish the azimuth angle of each source. In this paper, we propose a steering acoustic intensity estimator (SAIE) for azimuth angle estimation in the presence of interference. The azimuth angle of the interference is known in advance from the global positioning system (GPS) and compass data. By constructing the steering acoustic energy fluxes in the x and y channels of the acoustic vector hydrophone, the azimuth angle of interest can be obtained when the steering azimuth angle is directed toward the interference. Simulation results show that the SAIE outperforms the CAIE and is insensitive to the signal-to-noise ratio (SNR) and signal-to-interference ratio (SIR). A sea trial is presented that verifies the validity of the proposed method.

WITHDRAWN: DOA estimation method for broadband sound sources based on multipath characteristics of shallow sea channels

“…DOA estimation is also widely used in sonar, unmanned underwater vehicles, buoys, and other equipment placed in strictly limited space underwater in unmanned systems. The use of scalar hydrophone arrays is common in scienti c research experiments, but they are extremely limited in experimental processing due to their large size and operational di culties [3].In contrast, vector hydrophones can measure sound pressure and sound vector at common points, and the histogram method can be used to achieve sound source target orientation estimation using a single vector hydrophone [4][5]. In the literature [6], a complex sound intensity method using a single vector hydrophone for orientation estimation was proposed, and the performance of the algorithm was analyzed, and the calculation of the theoretical error was given, but in practice, the computation was large and failed to solve the practical problem.…”

Research on DOA Estimation Based on Acoustic Energy Flux Detection Using a Single MEMS Vector Hydrophone

“…A small-sized micro electromechanical system (MEMS) vector hydrophone with low power consumption has been manufactured by North University of China, providing a new access for the development and application of vector hydrophone [ 2 ]. The vector hydrophone can measure acoustic pressure and acoustic vibration velocity simultaneously [ 3 ]. A single MEMS vector hydrophone is capable of DOA estimation [ 4 ], suitable for limited deployment space of equipment.…”

Research on “Cylinder‐Four‐Beam” Microstructure Improvement of MEMS Bionic Vector Hydrophone

“…Sonar system is the key equipment to obtain information from the ocean. And vector hydrophone as an important part of the sonar detection devices can measure vibrating acceleration of water particle and has the advantage of noise cancellation due to its directional pattern [3][4][5][6]. Faced with the increasingly serious underwater security situation, it urgently needs to adopt new technologies and methods to meet the requirements of engineering application.…”