For acoustic source localisation in a fluid, sound pressure is traditionally measured using a microphone array, and acoustic beamforming is then applied to the pressure signals to localise the source. However, in some engineering applications, it is not feasible to place the microphone/hydrophone array in the fluid to localise an acoustic source. Hence, this work proposes a vibroacoustic beamforming for sound source localisation which applies the beamforming procedure to the measured vibration signals at the surface of a structure in contact with the fluid in which the acoustic source is located. To evaluate the localisation performance of the proposed method, a numerical study is conducted to localise a monopole source in a room using vibration data obtained from an elastic panel on the room wall. To simulate more realistic situation, different levels of signal to noise ratio are considered by moving the source away from the wall-mounted sensors and consequently altering the direct acoustic field (signal). Moreover, commonly used frequency domain beamforming techniques namely conventional beamforming, functional beamforming, minimum variance distortionless response and minimum power distortionless response are applied to the measured signals to localise the source. The performance of each technique is then evaluated by comparing the beamforming output obtained from vibroacoustic beamforming with that of acoustic beamforming and by quantifying the dynamic range and spatial resolution for each method. It can be concluded that vibroacoustic beamforming can be used for acoustic localisation as an alternative to the acoustic beamforming.

对于流体中的声源定位，传统上使用麦克风阵列测量声压，然后将声波束成形应用于压力信号以定位声源。然而，在一些工程应用中，将麦克风/水听器阵列放置在流体中以定位声源是不可行的。因此，这项工作提出了一种用于声源定位的振动声波束形成，它将波束形成过程应用于与声源所在的流体接触的结构表面的测量振动信号。为了评估所提出方法的定位性能，进行了数值研究，使用从房间墙壁上的弹性面板获得的振动数据来定位房间中的单极源。为了模拟更真实的情况，通过将声源远离壁挂式传感器并因此改变直接声场（信号）来考虑不同水平的信噪比。此外，将常用的频域波束形成技术，即传统波束形成、功能波束形成、最小方差无失真响应和最小功率无失真响应应用于测量信号以定位源。然后通过比较从声振波束形成获得的波束形成输出与声学波束形成的波束形成输出，并通过量化每种方法的动态范围和空间分辨率来评估每种技术的性能。可以得出结论，振动声波束形成可用于声学定位，作为声波束形成的替代方案。