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Journal articles on the topic 'Electromagnetic-acoustic transducer'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Suchkov, H. M., S. Yu Pliesnetsov, M. Ye Kalnitskyi, Yu Yu Koshkarov, and I. M. Oleksenko. "Electromagnetic-acoustic transducer with a combined magnetization." Paton Welding Journal 2025, no. 5 (2025): 51–54. https://doi.org/10.37434/tpwj2025.05.06.

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2

Mandracchia, Efrain A. "Electromagnetic acoustic transducer." Journal of the Acoustical Society of America 104, no. 6 (1998): 3152. http://dx.doi.org/10.1121/1.424225.

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3

Morimoto, Kazuo. "Electromagnetic acoustic transducer." Journal of the Acoustical Society of America 77, no. 4 (1985): 1634. http://dx.doi.org/10.1121/1.391949.

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4

Andoo, Kimihiro. "Electromagnetic electro-acoustic transducer." Journal of the Acoustical Society of America 115, no. 2 (2004): 448. http://dx.doi.org/10.1121/1.1669239.

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5

Herdovics, Balint, and Frederic Cegla. "Structural health monitoring using torsional guided wave electromagnetic acoustic transducers." Structural Health Monitoring 17, no. 1 (2016): 24–38. http://dx.doi.org/10.1177/1475921716682688.

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Torsional guided wave inspection is widely used for pipeline inspection. Piezoelectric and magnetostrictive transducers are most commonly used to generate torsional guided waves. These types of transducers require bonding or mechanical contact to the pipe which can result in changes over time which are undesirable for structural health monitoring. This article presents a non-contact Lorentz force–based electromagnetic acoustic transducer for torsional guided wave monitoring of pipelines. First, the excitation mechanism of the transducer is simulated by analyzing the eddy current and the static

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6

Guan, Yaojun, and Yang Gao. "Structural Design and Optimization of Low-Frequency High-Power Electromagnetic Transducer." International Journal of Acoustics and Vibration 29, no. 2 (2024): 116–24. http://dx.doi.org/10.20855/ijav.2024.29.22028.

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Crucial equipment for marine engineering and research, high-power ultra-low frequency sound sources have become necessary with the rapid development of seabed resource exploration, marine environment monitoring, underwater remote target detection, and communication technology. The current ultra-low frequency sound source cannot meet the requirements of practical applications. In this paper, both the finite element method and equivalent circuit method are used to improve the electromagnetic acoustic transducer, focusing on solving the structural design of the functional parts of the transducer,

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7

Carlson, Elmer V. "Magnetically shielded electromagnetic acoustic transducer." Journal of the Acoustical Society of America 91, no. 2 (1992): 1198. http://dx.doi.org/10.1121/1.402551.

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8

Flora, John. "Flexible electromagnetic acoustic transducer sensor." Journal of the Acoustical Society of America 122, no. 1 (2007): 17. http://dx.doi.org/10.1121/1.2756394.

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9

Pozniakova, Marharyta, Grigory Suchkov, Ruslan Mygushchenko, Olga Kropachek, and Andriy Donchenko. "Improvement of the measuring ultrasonic electromagnetic-acoustic transducer." Ukrainian Metrological Journal, no. 1 (June 21, 2023): 27–33. http://dx.doi.org/10.24027/2306-7039.1.2023.282540.

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Based on the analysis of previously published research and studies, it has been established that despite their significant advantages over traditional “contact” sensors in measurements, testing and diagnostics of thin dielectric coated (via paint, plastic, etc.) metal products, the available electromagnetic-acoustic transducers provide insufficient sensitivity and significant uncontrolled (“dead”) zone. This situation complicates testing of thin sheets, pipes, shells, tanks etc., and sometimes makes it impossible to measure the remaining thickness of the metal. The analysis of available

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10

Herdovics, Balint, and Frederic Cegla. "Long-term stability of guided wave electromagnetic acoustic transducer systems." Structural Health Monitoring 19, no. 1 (2018): 3–11. http://dx.doi.org/10.1177/1475921718805733.

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This article evaluates the long-term stability of a Lorentz force guided wave electromagnetic acoustic transducer. The specific application of the investigated electromagnetic acoustic transducer is pipeline health monitoring using low-frequency (27 kHz) long-range torsional guided waves. There is a concern that repeated swings in the temperature of the structure can cause irreversible changes in the transduction mechanism and therefore pose a risk to the long-term stability of transducers. In this article we report on guided wave signals acquired on a custom-built transducer while it was expo

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11

Strizhak, V. A., and A. V. Pryakhin. "Optimization of the Parameters of the Magnetizing Device of the Electromagnetic-Acoustic Transducer." Devices and Methods of Measurements 14, no. 2 (2023): 81–95. http://dx.doi.org/10.21122/2220-9506-2023-14-2-81-95.

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Contactless electromagnetic-acoustic transducers have a set of significant advantages over contact transducers, but at the same time they have significant disadvantages that require the development of effective magnetizing devices. Compared to magnetizing devices that are using permanent magnets, electric current magnetization devices are easily removed from the object of testing and cleaned from contamination by metal particles. Unfortunately, such transducers have significant dimensions and weight.A transducer containing a magnetic circuit magnetized by an electric current coil and two indep

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12

Cassabli, Salam Bussi EP Michel, G. M. Suchkov, S. Yu Plesnetsov, R. P. Mygushchenko, O. Yu Kropachek, and Yu O. Plesnetsov. "GENERATOR OF POWERFUL HIGH-FREQUENCY PACKAGE CURRENT PULSES FOR POWER SUPPLY OF ULTRASONIC ELECTROMAGNETIC-ACOUSTIC TRANSDUCERS." METHODS AND DEVICES OF QUALITY CONTROL, no. 2(43) (December 24, 2019): 88–95. http://dx.doi.org/10.31471/1993-9981-2019-2(43)-88-95.

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It is possible to increase the sensitivity of electromagnetic-acoustic transducers by three main methods: increasing the induction of a polarizing magnetic field; increase in strength of high-frequency current in the inductor of the converter; using modern methods of processing information packet pulses excited and received from the product. The increase in magnetic field induction of the converter is limited by the capabilities of modern powerful permanent magnets. In addition, there are significant difficulties in monitoring ferromagnetic control samples, due to the large pressing force betw

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13

Dehui, Wu, Yang Jiaxin, Chen Wenxiong, and Wang Teng. "An electromagnetic acoustic transducer with electromagnetic pulse restraining." Insight - Non-Destructive Testing and Condition Monitoring 63, no. 2 (2021): 111–17. http://dx.doi.org/10.1784/insi.2021.63.2.111.

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Electromagnetic acoustic transducers (EMATs) are widely used in non-destructive testing (NDT). However, when ultrasonic waves are excited, the transmitting coil generates a strong alternating magnetic field, resulting in the generation of an electromagnetic pulse. To address this problem, an EMAT with electromagnetic pulse restraining is presented in this paper. First, the cause of the electromagnetic pulse is investigated. Second, the conditions for restraining the electromagnetic pulse using the new transmitting coil are analysed. Finally, the design method for the new transmitting coil is p

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14

Morkun, V. S., N. V. Morkun, S. M. Gryshchenko, I. A. Gaponenko, А. А. Gaponenko, and Ye Yu Bobrov. "Modelling of an electromagnetic acoustic transducer." Mining Journal of Kryvyi Rih National University, no. 111 (2023): 88–95. http://dx.doi.org/10.31721/2306-5435-2023-1-111-88-95.

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15

Siegl, Alexander, Stefan Leithner, Bernhard Schweighofer, and Hannes Wegleiter. "Excitation of Mechanical Resonances in the Stationary Ring of a Mechanical Seal by a Continuously Operated Electromagnetic Acoustic Transducer." Sensors 23, no. 2 (2023): 1015. http://dx.doi.org/10.3390/s23021015.

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Acoustic/ultrasonic testing is now a common method in the field of nondestructive testing for detecting material defects or monitoring ongoing mechanical changes in a structure during operation. In many applications, piezoelectric transducers are used to generate mechanical waves inside the specimen. Their actual operating frequency is highly dependent on the dimensions of the transducer. Larger dimensions of the piezoelectric transducer allow for a lower operating frequency. However, these dimensions limit the use of piezoelectric transducers in certain applications where the size of the tran

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16

Zhang, Xu, Bo Li, Xiaolong Zhang, et al. "Internal and External Pipe Defect Characterization via High-Frequency Lamb Waves Generated by Unidirectional EMAT." Sensors 23, no. 21 (2023): 8843. http://dx.doi.org/10.3390/s23218843.

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Periodic permanent magnet(PPM) electromagnetic acoustic transducers (EMATs) are commonly employed for axial defect inspection in pipelines. However, the lowest-order shear horizontal waves (SH0) guided waves have difficulties in distinctly differentiating internal and external defects. To enhance the signal-to-noise ratio and resolution, a unidirectional electromagnetic acoustic transducer (EMAT) based on Circumferential Lamb waves (CLamb waves) is developed. Through structural parameter optimization and excitation frequency adjustment, high-amplitude and low-dispersion CLamb waves are success

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17

Johnson, Ward L., George A. Alers, and Bertram A. Auld. "Electromagnetic acoustic transducer and methods of determining physical properties of cylindrical bodies using an electromagnetic acoustic transducer." Journal of the Acoustical Society of America 107, no. 4 (2000): 1813. http://dx.doi.org/10.1121/1.428560.

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18

Coakley, K. J., A. V. Clark, and C. S. Hehman. "Empirical modelling of electromagnetic acoustic transducer data." Measurement Science and Technology 11, no. 3 (2000): 193–200. http://dx.doi.org/10.1088/0957-0233/11/3/304.

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19

Mikhailov, A. V., Yu L. Gobov, Ya G. Smorodinskii, and S. V. Shcherbinin. "An electromagnetic–acoustic transducer with pulsed biasing." Russian Journal of Nondestructive Testing 51, no. 8 (2015): 467–75. http://dx.doi.org/10.1134/s1061830915080069.

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20

Reiderman, Arcady, and Stanislav W. Forgang. "ELECTROMAGNETIC ACOUSTIC TRANSDUCER WITH CROSS-TALK ELIMINATION." Journal of the Acoustical Society of America 134, no. 2 (2013): 1435. http://dx.doi.org/10.1121/1.4817613.

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21

Komarov, V. A. "MAGNETOELASTIC ELECTROMAGNETIC ACOUSTIC TRANSFORMATION. PART VI." Kontrol'. Diagnostika, no. 262 (April 2020): 14–21. http://dx.doi.org/10.14489/td.2020.04.pp.014-021.

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In the case of EMAT using overhead transducers, a high-frequency alternating and strong polarizing magnetic fields jointly act on the magnetoelastic medium. These fields can be positioned at different directions to each other. The article analyzes the situation when the polarizing field, located along the interface of the media and the normal component of the emitter variable field are orthogonally related. That is, the classic Wiedemann effect is implemented in EMAT. It has been shown that the Wiedemann effect in EMAT contributes primarily to the generation of shear waves. The generation of l

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22

Komarov, V. A. "MAGNETOELASTIC ELECTROMAGNETIC ACOUSTIC TRANSFORMATION. PART VI." Kontrol'. Diagnostika, no. 262 (April 2020): 14–21. http://dx.doi.org/10.14489/td.2020.04.pp.014-021.

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In the case of EMAT using overhead transducers, a high-frequency alternating and strong polarizing magnetic fields jointly act on the magnetoelastic medium. These fields can be positioned at different directions to each other. The article analyzes the situation when the polarizing field, located along the interface of the media and the normal component of the emitter variable field are orthogonally related. That is, the classic Wiedemann effect is implemented in EMAT. It has been shown that the Wiedemann effect in EMAT contributes primarily to the generation of shear waves. The generation of l

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23

Thompson, Charles, Lejun Hu, Grace Remillard, Kavitha Chandra, Vacharaporn Paradorn, and Azizat Lawal. "A passive radio frequency excited acoustic transducer." Journal of the Acoustical Society of America 151, no. 4 (2022): A57. http://dx.doi.org/10.1121/10.0010645.

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The physical processes that govern the operation of a passive acoustic transducer driven into operation by a broadcast radio-frequency electromagnetic wave are presented. The transducer is comprised of a re-entrant cavity resonator operating in its resonant TEM mode and a sensing membrane. By displacing the membrane using the acoustic pressure, one can generate an amplitude modulated radio frequency signal proportional to the product of the displacement and the excitation signal. One may use the backscattered electromagnetic signal to recover the audio signal. The results for power generation,

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24

Nurmalia, Nurmalia. "Electromagnetic Acoustic Transducer (EMAT) sebagai Transduser Ultrasonik untuk Nondestructive Testing (NDT): Ulasan Artikel." Jurnal Otomasi Kontrol dan Instrumentasi 13, no. 1 (2021): 1–14. http://dx.doi.org/10.5614/joki.2020.13.1.1.

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Nondestructive testing (NDT) digunakan untuk mendeteksi keberadaan cacat pada suatu objek tanpa merusak objek tersebut, sehingga ideal untuk digunakan pada komponen-komponen infrastruktur yang sudah terpasang dan beroperasi. Diantara berbagai teknik, NDT ultrasonik memiliki kemampuan untuk menginspeksi cacat di sepanjang ketebalan objek, tidak hanya cacat permukaan. Metode pembangkitan gelombang ultrasonik yang paling populer adalah menggunaan piezoelectric transducer (PZT). Transduser ini memiliki efisiensi yang tinggi tetapi merupakan transduser kontak dan memerlukan pelumas (couplant), yang

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25

Bashirov, M. G., N. N. Luneva, I. G. Khusnutdinova, E. M. Bashirova, N. M. Zakharov, and R. R. Gaziev. "Perfecting evaluation methods of energy equipment technical condition and resource based on electromagnetic-acoustic effect." E3S Web of Conferences 124 (2019): 05034. http://dx.doi.org/10.1051/e3sconf/201912405034.

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To assess the technical condition and resource for the safe operation of electric and electrical equipment, it is proposed to use the electromagnetic-acoustic effect and the dynamic identification method based on the analysis of the coordinates of the roots of the characteristic equation (polynomial of the denominator of the transfer function of the system “control object electromagnetic-acoustic transducer”) on the complex plane . The transfer function of the studied system “control object electromagneticacoustic transducer” is an integral quantitative parameter characterizing the state of th

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26

Wang, Chaoqun, Jian Ma, Luyao Wang, Xue Bai, and Jianwei Chen. "Research on butterfly coil EMAT sound field characteristics." Journal of Physics: Conference Series 2815, no. 1 (2024): 012006. http://dx.doi.org/10.1088/1742-6596/2815/1/012006.

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Abstract As a main coil structure of an electromagnetic ultrasonic transducer (EMAT), the butterfly coil can excite transverse waves under the action of the vertical magnetic field, which is widely used in the thickness measurement of metal plates and the detection of internal buried defects. This paper discusses the directivity of the butterfly coil in the acoustic field to facilitate the design and application of the electromagnetic ultrasonic transducer and obtain the energy distribution state of the radiated acoustic field. The acoustic field directivity of butterfly coil EMAT is discussed

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27

Tkocz, Jozef, and Steven Dixon. "Electromagnetic acoustic transducer optimisation for surface wave applications." NDT & E International 107 (October 2019): 102142. http://dx.doi.org/10.1016/j.ndteint.2019.102142.

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28

XU, Yang, Akihiro TAGAWA, Masashi UEDA, and Takuya YAMASHITA. "Investigation on Electromagnetic Acoustic Transducer at Elevated Temperature." Proceedings of the Materials and processing conference 2004.12 (2004): 389–90. http://dx.doi.org/10.1299/jsmemp.2004.12.389.

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29

Lu, Junqiang, Zhenyu Qin, Baiyong Men, and Hongzhi Chen. "Electromagnetic compatibility study of acoustoelectric logging detector." Journal of Physics: Conference Series 2822, no. 1 (2024): 012071. http://dx.doi.org/10.1088/1742-6596/2822/1/012071.

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Abstract The acoustoelectric effect logging detector can achieve downhole acoustoelectric effect measurement, but the excitation of the acoustic transducer can generate significant electromagnetic interference (EMI) signals, it is difficult to effectively measure weak converted signals of acoustoelectric effect underground. The EMI problem of acoustoelectric effect logging detectors can be solved by studying EMI characteristics. Based on the analysis of the structure, measurement function, and measured interference signals of the receiving electrodes of the detector, the EMI sources, coupling

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30

Svilainis, Linas, Vytautas Dumbrava, and Andrius Chaziachmetovas. "Investigation of the Half Bridge and Transformer Push–Pull Pulser Topologies for Ultrasonic Transducer Excitation." Journal of Circuits, Systems and Computers 24, no. 05 (2015): 1550062. http://dx.doi.org/10.1142/s0218126615500620.

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Comparison of two high power pulser topologies is presented. Pulser design was aimed for piezoelectric transducer excitation, yet it can also be used for electromagnetic acoustic transducer (EMAT) or capacitive micromachined ultrasonic transducers (CMUTs) excitation. Pulser can produce both single rectangular pulse and trains of rectangular arbitrary duration pulses. In order to achieve the economy of the electrical power consumption and speed both high-pulling and low-pulling elements are active switches. Energy per pulse was used to evaluate the amount of energy consumed. Two topologies were

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31

Chi, Dazhao, Guangyu Sun, and Haichun Liu. "Improvement of EMAT Butterfly Coil for Defect Detection in Aluminum Alloy Plate." Materials 18, no. 13 (2025): 3207. https://doi.org/10.3390/ma18133207.

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For non-destructive testing (NDT) of defects in aluminum alloy plates, traditional ultrasonic contact methods face challenges from high temperatures and liquid couplant contamination. Using electromagnetic acoustic transducers (EMATs), a key issue is that longitudinal waves (L-waves) excited by the butterfly-coil EMATs interfere with the desired shear waves (S-waves) reflected by internal defects. To solve this problem, a simulation–experiment approach optimized the butterfly coil parameters. An FE model visualized the electromagnetic acoustic transducer (EMAT) acoustic field and predicted sig

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32

Shi, De Quan, and Gui Li Gao. "System for Detecting the Defects of Steel Tubes Based on Electromagnetic Acoustic Technology." Advanced Materials Research 383-390 (November 2011): 5339–43. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.5339.

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According to the electromagnetic acoustic technology, an automatic system was constructed to detect the defects of steel tubes. On the basis of analyzing the principle of detecting the defects of steel tubes by the electromagnetic acoustic technology, an electromagnetic acoustic transducer was designed to transmit and receive the electromagnetic acoustic signals. The data were acquired by the high-speed data acquisition card and transferred to computer by PCI bus, and then analyzed and processed by computer. In addition, the selective frequency and amplification technology was used to process

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33

Murayama, Riichi, and Koichi Mizutani. "OS02W0013 A functional electromagnetic acoustic transducer for optimum Lamb wave modes with multi-wavelengths." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2003.2 (2003): _OS02W0013. http://dx.doi.org/10.1299/jsmeatem.2003.2._os02w0013.

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34

Bashirov, Mussa G., Damir Sh Akchurin, Kirill N. Kuvaytsev, and Dmitry E. Maksimochkin. "NEURAL NETWORK PROCESSING OF ELECTROMAGNETIC ACOUSTIC SIGNALS TO IDENTIFY THE STRESS-STRAIN STATE AND DAMAGE OF POWER EQUIPMENT." Vestnik Chuvashskogo universiteta, no. 4 (December 26, 2023): 44–56. http://dx.doi.org/10.47026/1810-1909-2023-4-44-56.

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The purpose of the study is to develop and train an artificial neural network to identify the stress-strain state and damage to the metal of power equipment based on the values of the parameters of the harmonic components of the electromagnetic-acoustic transducer signal.  Materials and methods. Experimental study of the relationship between the parameters of the harmonic components of the signal of an electromagnetic-acoustic transducer with the stress-strain state and damage to the structure of standard metal samples, development of an artificial neural network and methods for it

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35

Murav'ev, V. V., O. V. Murav'eva, and A. L. Vladykin. "Acoustic and electromagnetic properties of a martensitic-aging ferro-nickel alloy with the addition of copper under mechanical tension." Дефектоскопия, no. 5 (May 15, 2023): 12–20. http://dx.doi.org/10.31857/s0130308223050020.

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The paper presents the results of a study of the effect of mechanical longitudinal uniaxial stretching on the velocity of longitudinal and transverse waves in XM-12 steel samples. During the research, an acoustic mirror-shadow method was used on multiple reflections of the control using an electromagnetic acoustic transducer and a piezoelectric transducer based on a polyvinylidene fluoride film to excite and receive waves. The elastic modules of the studied samples and the coefficients of acoustoelasticity are calculated.

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36

Dao, Duy-Vinh, Jen-Tzong Jeng, Van-Dong Doan, Huu-Thang Nguyen, and Bo-Yao Liang. "Development of Electromagnetic Acoustic Transducer System for Coin Classification." Sensors 22, no. 23 (2022): 9055. http://dx.doi.org/10.3390/s22239055.

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In this work, a method for identifying counterfeit coins based on an electromagnetic acoustic transducer (EMAT) to detect the difference in the coin’s natural acoustic frequency response is presented. In the experimental system, the acoustic oscillation induced by a pulsed magnetic field is received by a microphone and recorded by an oscilloscope. The natural acoustic frequency of the coin is resolved by the fast Fourier transform (FFT) method on the computer. It is found that the natural frequencies of the possible counterfeit coins deviate significantly from the standard ranges of 16.9 to 17

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37

Platunov, A. V., V. V. Murav'ev, O. V. Murav'eva, and P. A. Nikitina. "Mirror-shadow method of ultrasonic testing of the railroad wheelset axles using the electromagnetic-acoustic method of wave generation and reception." Дефектоскопия, no. 12 (December 15, 2023): 3–11. http://dx.doi.org/10.31857/s0130308223120011.

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The amplitude of the received signals during the ultrasonic testing of the railroad wheelset axles using the mirror-shadow method is significantly influenced by the quality of contact of the piezoelectric transducer with the cylindrical surface of the test object compared with the testing of objects with flat surfaces. The key reasons influencing the results of testing are the condition of the entry surface, its curvature, as well as the application force of the piezoelectric transducer. When using electromagnetic-acoustic transducers, the requirements for surface quality are significantly low

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38

Murayama, Riichi, Naoki Oishi, and Takahiro Miura. "116 Study of electromagnetic acoustic transducer for cylindrical wave." Proceedings of Conference of Kyushu Branch 2001.54 (2001): 31–32. http://dx.doi.org/10.1299/jsmekyushu.2001.54.31.

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39

Di, Wu, Li Ming-Xuan, and Wang Xiao-Min. "Shear Wave Field Radiated by an Electromagnetic Acoustic Transducer." Chinese Physics Letters 23, no. 12 (2006): 3294–96. http://dx.doi.org/10.1088/0256-307x/23/12/048.

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40

Dutton, B., F. Gamboa-Perera, M. Acosta, and Y. Nahmad-Molinari. "YBa2Cu3Ox superconducting transition measurement by an electromagnetic acoustic transducer." Review of Scientific Instruments 77, no. 3 (2006): 033903. http://dx.doi.org/10.1063/1.2173070.

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41

Jian, X., S. Dixon, I. Baillie, R. S. Edwards, J. Morrison, and Y. Fan. "Shear wave generation using a spiral electromagnetic acoustic transducer." Applied Physics Letters 89, no. 24 (2006): 244106. http://dx.doi.org/10.1063/1.2408644.

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42

Whaley, Hubert L. "Electromagnetic acoustic transducer for bolt tension and load measurement." Journal of the Acoustical Society of America 104, no. 6 (1998): 3152. http://dx.doi.org/10.1121/1.424224.

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43

SATO, Michio, Motohiko KIMURA, Hideharu OKANO, Tatsuo MIYAZAWA, Koichi NAGASE, and Masaaki ISHIKAWA. "Development of Ultrasonic Testing Equipment Incorporating Electromagnetic Acoustic Transducer." Journal of Nuclear Science and Technology 26, no. 5 (1989): 536–43. http://dx.doi.org/10.1080/18811248.1989.9734344.

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44

SATO, Michio, Hideharu OKANO, and Masaaki ISHIKAWA. "Development of Ultrasonic Testing Equipment Incorporating Electromagnetic Acoustic Transducer." Journal of Nuclear Science and Technology 29, no. 4 (1992): 400–407. http://dx.doi.org/10.1080/18811248.1992.9731541.

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45

Clark, Alfred V. "Ultrasonic strain gage using a motorized electromagnetic acoustic transducer." Journal of the Acoustical Society of America 111, no. 6 (2002): 2528. http://dx.doi.org/10.1121/1.1492887.

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46

Hasebe, Kazuhiko, Yosuke Mizuno, and Kentaro Nakamura. "Integrity evaluation of adhesive anchors using electromagnetic acoustic transducer." Journal of the Acoustical Society of America 140, no. 4 (2016): 3387. http://dx.doi.org/10.1121/1.4970837.

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47

Liang, Bao, Zhichao Li, Steve Dixon, Yang Yu, and Guofu Zhai. "Development of a magnetostrictive Fe3O4-film electromagnetic acoustic transducer." Sensors and Actuators A: Physical 361 (October 2023): 114593. http://dx.doi.org/10.1016/j.sna.2023.114593.

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48

Gautam, Ambuj Kumar, Ching-Chung Yin, and Bishakh Bhattacharya. "Design of orthogonal directional shear horizontal electromagnetic acoustic transducer." Proceedings of the Annual British Conference on Non-Destructive Testing 2023, no. 1 (2023): 1–11. http://dx.doi.org/10.1784/ndt2023.1b4.

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This research proposed an electromagnetic acoustic transducer (EMAT) for generating and receiving orthogonal directional shear horizontal (ODSH) guided waves in the metal plate-like structure. The proposed EMAT generates the fundamental mode of SH wave in the horizontal and vertical direction in the plane of the test sample. The ODSHEMAT combines a new Chevron-like coil design which generates an eddy current effect in the skin depth of the plate surface, and a periodic permanent magnet that applies a static magnetic field vertically with a periodicity equal to its wavelength. The direction of

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49

Cai, Zhichao, Zhenyong Zhao, Lan Chen, and Guiyun Tian. "Optimal design of shear vertical wave electromagnetic acoustic transducers in resonant mode." International Journal of Applied Electromagnetics and Mechanics 64, no. 1-4 (2020): 639–47. http://dx.doi.org/10.3233/jae-209374.

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In this paper, a new electromagnetic acoustic resonance (EMAR) transducer is proposed for precise thickness measurement in specimen. The new EMAR is composed of a mirror symmetric coil (MSC) and a pair of Nd-Fe-B permanent magnets with the different polarity for enhancing the generation and detection of resonant signals. Firstly, a finite element model was established to simulate the distributions of Lorentz force produced by new EMAR and the resonant process of shear waves. Furthermore, the relationship between the frequency response characteristic of the new EMAR and the common EMAR were exp

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Xu, Jie, Hui Li, You-Ling zhou, et al. "Performance analysis of vortex acoustic wave based on uniform circular array." Journal of Physics: Conference Series 2078, no. 1 (2021): 012069. http://dx.doi.org/10.1088/1742-6596/2078/1/012069.

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Abstract:

Abstract As a carrier for information and energy, acoustic waves have been applied in underwater communication widely, however, the narrow band and low transmission speed are the main problems. Whether in the field of optics or electromagnetic waves, the orbital angular momentum (OAM) represents the natural properties of the spiral phase structure. By introducing the OAM into the acoustics field, the transmission capacity and spectrum efficiency of the underwater acoustic communication system can be expanded. Based on the analysis and detection of the vortex acoustic wave generated by the circ

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