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The histogram algorithm based on sound intensity having been widely used to estimate the azimuths of underwater acoustic targets. The advantage of this algorithm is that all we need is a single vector hydrophone to distinguish multiple targets' azimuths. The histogram approach acquiesces in that the acoustic pressure is perfectly correlated with the particle velocity. However, the sound field excited...
Ultrasonic flow meter which provides non-invasive no-moving-parts construction is one of the fasted-growing technologies in flow gauging. Based on the general elasticity theory, this paper investigates sound wave propagation in elastic solid, as well as the mathematical description of ultrasonic transducer with the help of electric-acoustic analysis. Moreover, wave phenomenon in moving fluid is introduced...
Separation of suspended particles with ultrasonic radiation force suggests advantages in MEMS. But there are some difficulties to position the outlets in MEMS ultrasonic separator based on one-dimensional resonance. In this paper, a new type of MEMS ultrasonic resonance separator, where two anti-phase PZT-transducers are employed to generalize two-dimensional normal mode, is analyzed. This new separator...
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