New experiments demonstrate how to detect hidden objects like submarines or buried treasure using the power of acoustical physics.

Abstract: In this paper, a displacement sensor based on an open-ended step-impedance transmission line is reported. The sensor operates in reflection, and the output variable is the phase of the ...

Abstract: The evaluation method of reverberation chamber performance, the function and working principle of mechanical stirrer are described. The effect of diffuse reflection on the uniformity of ...