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The sound velocity in a magnetorheological fluid under the influence of magnetic fields is empirically studied in this work. The effect of changing the magnetic field both in geometry, intensity and uniformity using permanent magnets placed in different configurations is analyzed. It is shown that the acoustical properties of the fluid can be easily changed tuning them at our discretion.
In this work we present a comparison between several beam patterns obtained with a conventional SAFT technique, where only one element in emission and other in reception are used, applying different activation sequences of the elements of a two-dimensional array. As we show, different activation sequences produce different beam patterns, demonstrating thus that not only the elements used to emit and...
In this work we present a new algorithm, based on the polynomial division, that allows to obtain a desired coarray with arbitrary shape on a lineal array, using a synthetic aperture configuration with a finite number of subapertures of equal length. With this fast and simple algorithm, the wanted coarray is decomposed into a set of subapertures whose length is fixed by the requirements and resources...
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