Relevant bibliographies by topics / MHz acoustic wave

Academic literature on the topic 'MHz acoustic wave'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "MHz acoustic wave"

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Ellis, G. R. A., and P. J. Hall. "A 3072 Channel Surface Acoustic Wave Spectrum Analyser." Publications of the Astronomical Society of Australia 7, no. 1 (1987): 34–35. http://dx.doi.org/10.1017/s1323358000021780.

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AbstractA spectrum analyser based on SAW (surface acoustic wave) devices has been developed for Jupiter, solar and pulsar observations. It has an overall frequency range of 100 MHz and a frequency resolution of 30 kHz. A complete spectrum is produced every 80 μs. It is initially being used with a 4000 dipole broadband array in the frequency range 30-130 MHz and for Jupiter observations from 8-38 MHz.
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Kuznetsova, Iren, Andrey Smirnov, Vladimir Anisimkin, Sergey Gubin, Maria Assunta Signore, Luca Francioso, Jun Kondoh, and Vladimir Kolesov. "Inkjet Printing of Plate Acoustic Wave Devices." Sensors 20, no. 12 (June 12, 2020): 3349. http://dx.doi.org/10.3390/s20123349.

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In the paper, the results of production of Ag inkjet printed interdigital transducers to the acoustic delay line based on Y-cut X-propagation direction of lithium niobate plate for the frequency range from 1 to 14 MHz are presented. Additionally, morphological, structural, and electro-physical characteristics of the obtained electrodes were investigated. Mathematical modeling of the excitation of acoustic waves by these electrode structures was carried out. Comparison of the theoretical results with experimental ones showed their qualitative and quantitative coincidences. It was shown that conventional inkjet printing can replace the complex photolithographic method for production of interdigital transducers for acoustic delay lines working up to 14 MHz. The resulting electrode structures make it possible to efficiently excite acoustic waves with a high value of electromechanical coupling coefficient in piezoelectric plates.
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SEEMANN, K. M., F. KRONAST, A. HÖRNER, S. VALENCIA, A. WIXFORTH, A. V. CHAPLIK, and P. FISCHER. "ATTENUATION OF SURFACE ACOUSTIC WAVES BY SPIN–WAVE EXCITATIONS IN Co60Fe20B20." SPIN 04, no. 01 (March 2014): 1440005. http://dx.doi.org/10.1142/s2010324714400050.

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The acousto-magnetic attenuation of surface acoustic waves (SAW) in an Co 60 Fe 20 B 20 exchange spring magnet is evidenced experimentally. By high-resolution magnetic imaging using photo-excitation electron microscopy (XPEEM) and magnetometry measurements, the deflection of the ferromagnet from its equilibrium state is visualized. Along a harmonic oscillator model with damping term, the experimental observation of SAW attenuation is attributed to low-frequency spin wave generation in a magnetic exchange spring. Measuring the SAW attenuation at four eigenfrequencies generated via on-chip higher-harmonic generation, we obtain a sub-GHz resonance at f0 = 538 MHz.
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Yu, Tai-Ho. "Characteristic measurement of a surface acoustic wave nano-stepping motor by using a fiber-optic Michelson interferometer." Advances in Mechanical Engineering 11, no. 9 (September 2019): 168781401987619. http://dx.doi.org/10.1177/1687814019876190.

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The actuation technique of a surface acoustic wave motor with nanometer scale linear motion was experimentally investigated in this study. The surface acoustic wave motor comprised a stator made of a Y+128° cut, X-propagation lithium niobate substrate with silicon sliders and an array of pillar projections manufactured using semiconductor fabrication techniques. Two sets of interdigital transducers deposited on the substrate were used to generate Rayleigh waves with a driving frequency of up to 9.7 MHz. The surface acoustic wave motor was driven by friction exerted on the contact area between the slider and the surface acoustic waves in a retrogressive elliptical locus. The stepping motion of the surface acoustic wave motor was measured directly using a fiber-optic Michelson interferometer through demodulation with a digital signal processing method. A displacement of several nanometers was achieved at each step during the experiment.
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Javadi, Yashar, and Sergej Hloch. "Employing the Waves to Measure Longitudinal Residual Stresses in Different Depths of a Stainless Steel Welded Plate." Advances in Materials Science and Engineering 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/746187.

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Ultrasonic stress measurement is based on the acoustoelasticity law which presents the relationship between the stress and acoustic wave velocity in engineering materials. The technique uses longitudinal critically refracted () waves that travel parallel to the material surface. The wave is a bulk longitudinal wave that propagates within an effective depth underneath the surface while the penetration depth of a wave depends on its frequency. It is possible to measure the residual stress in different depths by employing different frequencies of the waves. This paper evaluates welding residual stresses in different depths of a plate made of austenitic stainless steel (304L). The penetration depths are accurately measured for the waves produced by 1 MHz, 2 MHz, 4 MHz, and 5 MHz transducers. Residual stresses through the thickness of the plate are then evaluated by employing four different series of transducers. It has been concluded that the method is nondestructive, easy and fast, portable, readily available, and low cost and bulk measuring technique which can be accurately employed in through-thickness stress measurement of austenitic stainless steels.
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Sharma, Parmanand, Sanjeev Kumar, and K. Sreenivas. "Interaction of surface acoustic waves and ultraviolet light in ZnO films." Journal of Materials Research 18, no. 3 (March 2003): 545–48. http://dx.doi.org/10.1557/jmr.2003.0069.

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The frequency response of a 37 MHz bulk LiNbO3 surface acoustic wave (SAW) filter with a 200-nm-thick ZnO overlayer exhibited a downshift in the frequency with ultraviolet (UV) light due to acoustoelectric interactions between the photo-generated carriers in the semiconducting ZnO and the surface acoustic waves. In contrast, a 36 MHz ZnO thin film SAW delay-line with insulating ZnO films exhibited an upshift in the frequency. The response was more pronounced at higher harmonics (130–315 MHz) and was attributed to changes in the elastic/dielectric properties in the upper surface layer of ZnO. A linear change in the frequency with UV intensity shows immense applicability for wireless ultraviolet sensor applications.
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Raboonik, Abbas, and Paul S. Cally. "Benchmarking hall-induced magnetoacoustic to Alfvén mode conversion in the solar chromosphere." Monthly Notices of the Royal Astronomical Society 507, no. 2 (August 13, 2021): 2671–83. http://dx.doi.org/10.1093/mnras/stab2293.

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ABSTRACT A 2.5D numerical model of magnetoacoustic-Alfvén linear mode conversions in the partially ionized low solar atmosphere induced by the Hall effect is surveyed, varying magnetic field strength and inclination, and wave frequency and horizontal wavenumber. It is found that only the magnetic component of wave energy is subject to Hall-mediated conversions to Alfvén wave-energy via a process of polarization rotation. This strongly boosts direct mode conversion between slow magnetoacoustic and Alfvén waves in the quiet low chromosphere, even at mHz frequencies. However, fast waves there, which are predominantly acoustic in nature, are only subject to Hall-induced conversion via an indirect two-step process: (i) a geometry-induced fast–slow transformation near the Alfvén-acoustic equipartition height zeq; and (ii) Hall-rotation of the fast wave in z > zeq. Thus, for the two-stage process to yield upgoing Alfvén waves, zeq must lie below or within the Hall-effective window 0 ≲ z ≲ 700 km. Magnetic field strengths over 100 G are required to achieve this. Since the potency of this Hall effect varies inversely with the field strength but directly with the wave frequency, only frequencies above about 100 mHz are significantly affected by the two-stage process. Increasing magnetic field inclination θ generally strengthens the Hall convertibility, but the horizontal wavenumber kx has little effect. The direct and indirect Hall mechanisms both have implications for the ability of MHD waves excited at the photosphere to reach the upper chromosphere, and by implication the corona.
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Chukwunonye, C. U., Nicholas J. Jones, and Gabriela Petculescu. "Sensitization in Aluminum Alloys: Effect on Acoustic Parameters." Corrosion 74, no. 11 (August 15, 2018): 1237–44. http://dx.doi.org/10.5006/2832.

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Velocity and attenuation of shear and longitudinal sound waves were measured as a function of sensitization level in AA5083-H116 and AA5456-H116 aluminum alloys using two different techniques: resonant ultrasound spectroscopy (RUS) and pulse echo (PE). The frequency range for RUS was 0.3 MHz to 1 MHz. For PE, longitudinal 3.5 MHz and shear 1 MHz transducers were used. Sensitization was artificially induced in the laboratory by isothermally heating specimens at temperatures of 120°C, 175°C, 185°C, and 240°C for fixed periods of time (12 h to 96 h, the longer times for the lower temperatures). Measurements were repeated after each heating sequence. The overall changes are reported as percent difference between the as received and the fully sensitized states. The quantity that was found to be most sensitive to the degree of sensitization in this study is the attenuation coefficient of longitudinal waves, αL. The measured change in αL exceeds 20%, with error bars within 1% to 4%. Despite the magnitude of the error bars, the αL vs. degree-of-sensitization curve is clear and smooth. The shear wave velocity changed by 1.2% to 1.5%, with error bars within 0.01% to 0.1%. The larger change was observed for the AA5456 alloy, which contains more Mg. The longitudinal wave velocity was found to change by 0.5% for the 5456 alloy, with error bars within 0.004% to 0.02%. The attenuation coefficient for shear waves was not measured. This study identifies multiple ultrasonic parameters that can be combined into a new, on-site, nondestructive tool for quantitatively monitoring the sensitization level in Mg-rich aluminum alloys, with possible extensions to other materials.
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Jarosz, B. J., and R. L. Clarke. "Acoustic radiation from thin rods in water." Canadian Journal of Physics 64, no. 6 (June 1, 1986): 671–76. http://dx.doi.org/10.1139/p86-124.

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The ultrasound pressure distribution produced by end-excited stainless-steel rods immersed in water has been investigated. Rod diameters of 0.238 and 0.319 cm were tested at frequencies between 1.0 and 3.5 MHz. Immersion depths up to 10 cm were studied. Semiperiodic patterns were observed along the rods, with repetition lengths of 0.6 and 1.1 cm. Fast Fourier-transform analysis of the patterns showed the presence of three spatial frequencies interpreted to be the lowest mode longitudinal wave, Rayleigh-type surface waves, and the Stoneley wave propagating in the liquid.
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Zhang, Naiqing, Yue Wen, and James Friend. "MHz-Order Surface Acoustic Wave Thruster for Underwater Silent Propulsion." Micromachines 11, no. 4 (April 16, 2020): 419. http://dx.doi.org/10.3390/mi11040419.

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High frequency (MHz-order) surface acoustic waves (SAW) are able to generate intense fluid flow from the attenuation of acoustic radiation in viscous fluids as acoustic streaming. Though such flows are known to produce a force upon the fluid and an equivalent and opposing force upon the object producing the acoustic radiation, there is no convenient method for measuring this force. We describe a new method to accomplish this aim, noting the potential of these devices in providing essentially silent underwater propulsion by virtue of their use of the sound itself to generate fluid momentum flux. Our example employs a 40 MHz SAW device as a pendulum bob while immersed in a fluid, measuring a 1.5 mN propulsion force from an input power of 5 W power to the SAW device. Supporting details regarding the acoustic streaming profile via particle image velocimetry and an associated theoretical model are provided to aid in the determination of the propulsion force knowing the applied power and fluid characteristics. Finally, a simple model is provided to aid the selection of the acoustic device size to maximize the propulsion force per unit device area, a key figure of merit in underwater propulsion devices. Using this model, a maximum force of approximately 10 mN/cm 2 was obtained from 1 W input power using 40 MHz SAW in water and producing a power efficiency of approximately 50%. Given the advantages of this technology in silent propulsion with such large efficiency and propulsion force per unit volume, it seems likely this method will be beneficial in propelling small autonomous submersibles.
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Dissertations / Theses on the topic "MHz acoustic wave"

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Achour, Bilel. "Capteurs à ondes acoustiques de surface fonctionnant à 104 et 208 MHz. : modélisation, développement et application à la détection d’ions lourds métalliques." Thesis, Le Mans, 2020. http://www.theses.fr/2020LEMA1017.

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Les capteurs à ondes acoustiques de surfaces (SAW : Surface Acoustic Waves) présentent de nombreux avantages, dont une grande sensibilité, un paramètre clé dans diverses applications. Dans cette thèse, deux voies sont explorées pour améliorer la sensibilité des dispositifs SAWs : le passage en mode de Love, avec une couche guide d’onde en résine époxyde SU-8, et la montée en fréquence de 104 à 208 MHz. Avant de réaliser de tels dispositifs en salle blanche puis de les utiliser en tant que capteurs chimiques, des simulations numériques ont été entreprises, en utilisant tout d’abord le logiciel MATLAB, puis par la méthode des éléments finis, via le logiciel COMSOL Multiphysics. L’épaisseur optimale de la couche guide d’onde, permettant un gain important en sensibilité, a été estimée. Un écart entre l’expérience et la simulation a été trouvé soulignant la nécessité de poursuivre les phases d’optimisation dans cette voie. Une confrontation calculs/expériences a été menée avec succès pour les structures SH-SAW. Ces dispositifs ont été fonctionnalisés avec un dérivé d’anthracène pour détecter les ions zinc en milieu aqueux. Les résultats gravimétriques ont montré un gain en sensibilité d’un facteur 2.3, en augmentant la fréquence de travail de 104 MHz à 208 MHz
Surface Acoustic Wave (SAW) sensors have many advantages mainly a high sensitivity, which is a key parameter in various applications. Two strategies were explored, in this thesis, to enhance the sensitivity of SAW devices: switching to Love mode, with a waveguide layer in SU-8 epoxy resin, and frequency increase from 104 to 208 MHz. Prior to the realization of such devices in a clean room and their further use as chemical sensors, numerical simulations were done, first with MATLAB software, and then with the finite element method, via COMSOL Multiphysics software. The optimum thickness of the waveguide layer, allowing a significant gain in sensitivity, was estimated. A disagreement between experience and simulation was found highlighting the need to continue optimization steps. A confrontation between calculations / experiments was carried out for the SH-SAW structures. These devices were functionalized with an anthracene derivate for zinc ions detection in aqueous media. Gravimetric results indicate that increasing the operating frequency from 104 MHz to 208 MHz permits a gain in sensitivity by a factor of 2.3
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Book chapters on the topic "MHz acoustic wave"

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Briggs, G. A. D., O. V. Kolosov, and M. M. Puentes Heras. "Materials Characterization by Surface Acoustic Waves from 200 Mhz to 20 Ghz." In Acoustical Imaging, 657–64. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4419-8772-3_107.

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Vogt, M., H. Ermert, S. el Gammal, K. Kaspar, K. Hoffmann, M. Stücker, and P. Altmeyer. "High Resolution Estimation of Axial and Transversal Bloodflow with a 50 MHZ Pulsed Wave Doppler System for Dermatology." In Acoustical Imaging, 317–24. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/0-306-47108-6_44.

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Rammacher, Wolfgang. "Line Simulation of Solar Structures Permeated by Acoustic and MHD-Waves." In Mechanisms of Chromospheric and Coronal Heating, 414–16. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-87455-0_69.

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Afanasyev, A. N., and A. M. Uralov. "Coronal Shock Waves, EUV Waves, and Their Relation to CMEs. II. Modeling MHD Shock Wave Propagation Along the Solar Surface, Using Nonlinear Geometrical Acoustics." In Energy Storage and Release through the Solar Activity Cycle, 173–85. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-4403-9_12.

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Sui, Meili, Chen Lin, Nan Wang, and Jianxin Wang. "The Mutation Analysis of Ultrasonic Acoustic Emission in Cavitation." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220516.

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Cavitation and embolization of plants accompanied by conduit vibration due to intermolecular adhesion of water or the adhesion of the conduit wall are signs of water stress. Ultrasonic acoustic emission (UAEs) was used to detect plant air pockets and embolic events transmitted by vibration. The UAEs could be detected in ultrasonic frequency between 100K Hz and 1 MHz. In general, the spatial location of UAEs sources for the influence of signal spatial distribution are greater than the UAEs signal wave shapes to the time. Using the electro-acoustic similarity theory, UAEs can be seen as the step voltage sources, the medium as the load, the water column rupture model (UAEs mutation model) in the plant conduit can be established by the analog circuit method. Without considering the change of plant stems medium density and ultrasonic velocity, the ultrasonic energy is proportional to square of the ultrasonic pressure. According to plant water stress relationships between ultrasonic energy release and ultrasonic energy, the UAEs ring counts or signal strength can be used to indicate the range and extent of plant conduits embolism, which can establish the model of UAEs and physiology by statistical laws. Studies have shown that the UAEs waves transmit in the plant fiber, signal attenuation in the fiber is a function of cell tissue hardness, and the approximate attenuation values are 1 dB/cm, 10 dB/cm and 20 dB/cm in hardwood, softwood and herbaceous plants, respectively.
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Aguilar-Torres, Daniel, Omar Jiménez-Ramírez, Juan A. Jimenez-Garcia, Gonzalo A. Ramos-López, and Rubén Vázquez-Medina. "Acoustic and Thermal Analysis of Food." In Food Preservation and Packaging - Recent Process and Technological Advancements [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.108007.

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Exploring the food acoustic features can help to understand and effectively apply some preservation treatments that extend their expiration date. The food composition and properties are crucial issues in their acoustic behavior when stimulated with acoustic waves. If these waves are varied in frequency and intensity, the temperature of food could be affected facilitating the moisture removal or degrading its nutritional condition. Therefore, we presented a guide to determine and apply the most influential spectral component of ultrasound waves on apple and tomato when dehydrated in an ultrasound-assisted dehydration system. In this guide, applying the finite element method, we study, simulate, and analyze the acoustic and thermic behavior of apple and tomato inside a chamber when radiated with acoustic waves at (1 Hz, 1 MHz) by using up to three piezoelectric transducers. From the physical parameters defined in the simulation environment for apple and tomato, we find the relevant spectral components that can produce temperature changes in each food sample considering the radiation time and the food sample location. This work represents an analysis guide that allows for determining the best conditions for the acoustic radiation of foods, avoiding their structural and nutritional damage, and seeking the design of energy-efficient processes.
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Doraiswamy, L. K. "Sonoorganic Synthesis Engineering." In Organic Synthesis Engineering. Oxford University Press, 2001. http://dx.doi.org/10.1093/oso/9780195096897.003.0031.

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Ultrasonics or ultrasound refers to sound waves beyond the audible range of the human ear. The normal human hearing range is 16-16,000 cycles per second. The accepted terminology for one cycle per second is the Hertz (or Hz), and hence the hearing range is expressed as 16 Hz to 16kHz. Ultrasound is normally considered to lie approximately in the range of 15kHz to 10 MHz, that is, 15 x 103 to 10000 x 103 cycles per second, with acoustic wavelengths of 10 to 0.01 cm. Like any sound wave, ultrasound is propagated through a medium in alternating cycles of compression and stretching or rarefaction. These produce certain effects in the medium that can be usefully exploited. One such application is in the field of synthetic organic chemistry, first reported by Richards and Loomis (1927) and designated sonochemistry. The most appealing feature of sonochemistry is its ability to enhance reaction rates, often to remarkably high levels under environmentally benign conditions. Despite this potential, economic considerations have precluded the use of sonochemical processes. It is noteworthy, however, that a change in perspective appears to be emerging, as evidenced by the fact that a pilot plant is currently being funded by a French company to sonochemically oxidize cyclohexanol to cyclohexanone, and developmental work is underway in Germany to produce 4 tons of Grignard reagent per year (Ondrey et al., 1996). A number of books and reviews covering mostly the chemical aspects of sonochemistry have appeared over the years, for example, Suslick, 1988, 198, 1990a,b; Ley and Low, 1989; Mason, 1986, 1990a,b, 1991; Mason and Lorime 1989; Price, 1992; Bremner, 1994; Low, 1995; Luche, 1998. A recent review Thompson and Doraiswamy (1999) covers both the chemical and engineering aspects of sonochemistry and another by Keil and Swamy (1999) examines the present state of our understanding of sonoreactor design. Sonochemical enhancement of reaction rates is caused by a phenomenon called cavitation. Therefore, we largely confine the treatment in this chapter to the chemical and reaction engineering (scale-up) aspects of cavitation and its associated effects (see Shah et al., 1999, for a detailed treatment). An alternative means of achieving the same result is by mimicking the ultrasonic effect by inducing “hydrodynamic cavitation.”
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Conference papers on the topic "MHz acoustic wave"

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Zhu, Xu, and Eun Sok Kim. "Acoustic-Wave Liquid Mixer." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0936.

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Abstract This paper presents a novel approach for microfluid mixing by loosely-focused acoustic waves (generated by piezoelectric Zinc Oxide thin film). Initial results show that our acoustic-wave liquid mixer (AWLM) produces a convection flow in liquid very efficiently, when it is driven by a sinusoidal wave with frequencies corresponding to the thickness-mode resonances (e.g. 240 and 480 MHz) of the piezoelectric film. The AWLM operates without any significant temperature increase in liquid, and will be very attractive for mixing temperature-sensitive fluids.
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Bowers, William D., and Raymond L. Chuan. "200-MHz surface acoustic wave mass microbalance." In SPIE Proceedings, edited by A. Peter M. Glassford. SPIE, 1990. http://dx.doi.org/10.1117/12.22601.

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Islam, T., U. Mittal, A. T. Nimal, and M. U. Sharma. "Surface Acoustic Wave (SAW) vapour sensor using 70 MHz SAW oscillator." In 2012 Sixth International Conference on Sensing Technology (ICST 2012). IEEE, 2012. http://dx.doi.org/10.1109/icsenst.2012.6461651.

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Du, Jikai. "Acoustic Wave Propagation Simulation in Double-Layered Composite Cylindrical Structures." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65085.

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Ultrasound guided waves have been recognized as an effective tool for the rapid and long-range inspection of composite cylindrical structures, but its application is still limited due to the complex nature of guided waves and their interactions with material geometry and material properties. This paper uses finite element technique to simulate the ultrasound guided wave propagation in layered composite cylinders. Ultrasound guided wave propagation was analyzed in a double-layered cylinder composed of an anisotropic unidirectional carbon fiber/epoxy resin composite layer wrapped on an isotropic aluminum cylinder. The carbon fiber orientation is either along the cylinder circumferential direction or axial direction. Ultrasound wave is excited from a PZT-4 transducer which is placed on the top of a Plexiglas wedge to adjust the ultrasound incident angle into the cylinder. Low ultrasound frequencies at 0.5 and 1.0 MHz were selected to improve the effect of attenuation and simulation efficiency. Wave propagation velocities and wave structures were analyzed at various positions of the cylinder. This study helped to examine the effect of fiber orientation on wave dispersion characteristics and to assess the feasibility of applying ultrasound guided wave technique for the evaluation of composite cylindrical structures.
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Zhang, Xinya, Ted Jackson, Emmanuel Lafound, Pierre Deymier, and Jerome Vasseur. "Surface Acoustic Wave Band Gaps and Phononic Structures on Thin Solid Plates." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81029.

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Novel phononic crystal structures on thin plates for material science applications in ultrasonic range (~ MHz) are described. Phononic crystals are created by a periodic arrangement of two or more materials displaying a strong contrast in their elastic properties and density. Because of the artificial periodic elastic structures of phononic crystals, there can exist frequency ranges in which waves cannot propagate, giving rise to phononic band gaps which are analogous to photonic band gaps for electromagnetic waves in the well-documented photonic crystals. In the past decades, the phononic structures and acoustic band gaps based on bulk materials have been researched in length. However few investigations have been performed on phononic structures on thin plates to form surface acoustic wave band gaps. In this presentation, we report a new approach: patterning two dimensional membranes to form phononic crystals, searching for specific acoustic transport properties and surface acoustic waves band gaps through a series of deliberate designs and experimental characterizations. The proposed phononic crystals are numerically simulated through a three-dimensional plane wave expansion (PWE) method and experimentally characterized by a laser ultrasonics instrument that has been developed in our laboratory.
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Katzman, Moshe, Maayan Priel, Leroy Dokhanian, Inbar Shafir, Matan Slook, Saawan Kumar Bag, and Avi Zadok. "Surface Acoustic Wave Microwave Photonic Filters in Silicon-on-Insulator with 16 and 32 Taps." In CLEO: Science and Innovations. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_si.2022.sw4o.4.

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Integrated, discrete time microwave filters are realized in surface acoustic wave photonic devices in standard silicon on insulator. The devices are scaled to 16 and 32 taps. A single 7 MHz-wide passband is demonstrated.
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Litman, R. B., K. R. Wilt, H. A. Scarton, and G. J. Saulnier. "Shear and Longitudinal Acoustic Communication and Power Transfer Through Plates Using Acoustic Wedges." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38716.

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Techniques for wireless acoustic communication and energy transfer along steel plates and piping to avoid physical penetrations and wire feed-throughs are presented. Longitudinal and shear acoustic waves (polarized in the direction of the plate/pipe wall thickness) transmitted into steel plates using steel wedges are analyzed using finite-element analysis. Propagation of steady-state waves at frequencies of 1 MHz in steel plates using triangular steel wedges with varying wave launch angles were used, where the steel plate was bounded by cement on one side and engine oil on the other. Successful simulation was achieved at large axial distance from the transmitting wedge with reception into a second reversed wedge, which is applicable for both power and data transmissions. At a distance of 0.41 m the energy transfer efficiency was seen to increase with increasing launch angle to 0.1 % for shear waves and 0.03 % for longitudinal waves when operating with an 80 degree wedge.
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Destgeer, Ghulam, Anas Alazzam, and Hyung Jin Sung. "Ultra-High Frequency Sound Waves for Microparticle Separation." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-18682.

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In this study, we have demonstrated a particle separation device taking advantage of the ultra-high frequency sound waves. The sound waves, in the form of surface acoustic waves, are produced by an acoustofluidic platform build on top of a piezoelectric substrate bonded to a microfluidic channel. The particles’ mixture, pumped through the microchannel, is focused using a sheath fluid. A travelling surface acoustic wave (TSAW), propagating normal to the flow, interacts with the particles and deflect them from their original path to induce size-based separation in a continuous flow. We initially started the experiment with 40 MHz TSAWs for deflecting 10 μm diameter polystyrene particles but failed. However, larger diameter particles (∼ 30 μm) were successfully deflected from their streamlines and separated from the smaller particles (∼ 10 μm) using TSAWs with 40 MHz frequency. The separation of smaller diameter particles (3, 5 and 7 μm) was also achieved using an order of magnitude higher-frequency (∼ 133 MHz) TSAWs.
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Ketterling, Jeffrey A., and Ronald H. Silverman. "High-frequency, plane-wave, multi-pulse acoustic contrast agent imaging at 16 MHz." In 2019 IEEE International Ultrasonics Symposium (IUS). IEEE, 2019. http://dx.doi.org/10.1109/ultsym.2019.8925791.

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Shih, H. H., and B. Strong. "Laboratory Study of ADCP Wave Measurements." In ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/omae2002-28107.

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The National Ocean Service (NOS) collects real-time environmental data to support mission activities including navigation safety, coastal hazard mitigation, and coastal resource management. Near shore wave information is important for these activities and is of growing interest to marine user groups. Acoustic Doppler current profiler (ADCP) are a primary tool for NOS current measurement programs. Recent technology development has added wave measurement capability to these instruments and provided a convenient way for wave monitoring. However, only limited field comparative studies have been conducted. The need to further understand the performance of these instruments and their operation requirements exists. Tests under controlled laboratory conditions offer certain advantages over field intercomparisons including reduced measurement uncertainties, isolation of variables, and is generally cost effective. This paper describes the study of wave measurement performance of a RDI 1200 KHz ADCP in a wave basin with prescribed waves consist of regular, irregular, and multi-directional waves. The steepness and peak energy frequency for each type of waves, and the orientation of ADCP acoustic beams relative to incident waves were varied. A Linear Array of five ultrasonic sensors and a SonTek 5 MHZ ADVOcean instrument were used to provide reference for intercomparison. The ADCP shows good measurement resolutions and agrees well with the reference measurements.
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