Wave probing systems are used to obtain 2D or 3D images of objects. According to the nature of the waves used (acoustic-microwave and others), these waves can penetrate the fabrics or barriers that are in their way, so it is possible to photograph hidden objects. A system for ultrasonic wideband probing in air with multiple transmitters and multiple receivers with parallel digitization of signals from the receiving array using undersampling is proposed. Probing at frequencies from 38 kHz to 43 kHz is considered when receiving array signals are digitized at a frequency of 18 kHz. Transmitter and receiver placements have been optimized to minimize artifacts and noise. the transmitting and receiving arrays are located at the same plane. The presented results of the experimental study confirm that the processing of measured signals based on spatially matched filtering makes it possible to visualize scattering objects in the environment, including those hidden behind sound-permeable barriers.
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