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This paper reports on a method for estimating direction of a sound with one directional acoustic sensor. Inspired by the two input structure of bushcricket ear, our sensor was designed to have an acoustic channel and a micro piezo-resistive cantilever. The radiated sound acts simultaneously on the external and on the inner surface of the cantilever. As the result, the directionality of our sensor...
Measuring the target range (ranging) in shallow water and at short distance is always affected by two factors namely reflection and refraction at the surface and bottom. Also since the maximum range is low, the loss is not significant. Therefore, received amplitude of multipath is high and comparable to the received wave in the direct way. Moreover, due to low bit angle of the surface and bottom reflection,...
In this paper, the extraction of the coupling-of-modes (COM) model attenuation parameter gamma in a finite grating is considered. We use test structures comprising identical transmitting and receiving transducers and a grating centered in the acoustic channel along the propagation direction of the surface acoustic wave (SAW). The extraction procedure proposed is based on studying the magnitude of...
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