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Artículos de revistas sobre el tema "Antennes de microphones"

Autor: Grafiati

Publicado: 7 de julio de 2024

Última modificación: 31 de julio de 2025

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1

Yon, H., N. H. Abd Rahman, M. A. Aris, and Hadi Jumaat. "Developed high gain microstrip antenna like microphone structure for 5G application." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 3 (2020): 3086. http://dx.doi.org/10.11591/ijece.v10i3.pp3086-3094.

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We present a new development of microstrip antenna structure combining a simple circular structure with a ring antenna structure as the parasitic element to improve the antenna gain and bandwidth for 5G mobile application. The proposed antenna was fed by a 50Ω microstrip feeding line due to its advantages in performance. The antenna was designed and simulated using a single substrate with double layered copper (top and bottom) with the radiating patch on the top layer and full ground on the bottom layer of the same substrate. Three antennas have been designed namely; design1, design2 and desig

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2

H., Yon, H. Abd Rahman N., A. Aris M., and Jumaat H. "Developed high gain microstrip antenna like microphone structure for 5G application." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 3 (2020): 3086–94. https://doi.org/10.11591/ijece.v10i3.pp3086-3094.

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We present a new development of microstrip antenna structure combining a simple circular structure with a ring antenna structure as the parasitic element to improve the antenna gain and bandwidth for 5G mobile application. The proposed antenna was fed by a 50Ω microstrip feeding line due to its advantages in performance. The antenna was designed and simulated using a single substrate with double layered copper (top and bottom) with the radiating patch on the top layer and full ground on the bottom layer of the same substrate. Three antennas have been designed namely; design1, design2 and desig

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3

Itare, Nathan, Jean-Hugh Thomas, and Kosai Raoof. "Genetic Algorithm-Based Acoustic Array Optimization for Estimating UAV DOA Using Beamforming." Drones 9, no. 2 (2025): 149. https://doi.org/10.3390/drones9020149.

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The localization of unmanned aerial vehicles is an important topic due to several threats near sensitive sites. Localization based on their sounds has been a particular point of interest in past studies for many years. It requires the use of a microphone array. The positioning of the various microphones making up an antenna defines the intrinsic directivity of the array. In this study, a genetic algorithm is used to determine the microphone positions that optimize directivity in a focus direction and for a frequency, by favoring the narrowness of the main lobe and the reduction of the secondar

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4

Donavan, Paul R. "Application of Sound Intensity to the Measurement of Aeroacoustic Noise Sources in Flow." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 266, no. 2 (2023): 839–46. http://dx.doi.org/10.3397/nc_2023_01_1121.

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In the late 1970's and early 1980's, Jing-Yau Chung along with Joseph Pope published several external General Motors reports on the then novel measurement of sound intensity (SI) using the two-microphone, cross-spectral method. Application of this measurement method was then extended to sound intensity measurements in flow. Through component wind tunnel measurements, it was determined that the intensity of noise sources could be accurately measured up to a level of 15 dB below the sound pressure level generated by flow noise on microphones. An initial application of this method was to the iden

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5

Sezen, A. S., S. Sivaramakrishnan, S. Hur, R. Rajamani, W. Robbins, and B. J. Nelson. "Passive Wireless MEMS Microphones for Biomedical Applications." Journal of Biomechanical Engineering 127, no. 6 (2005): 1030–34. http://dx.doi.org/10.1115/1.2049330.

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This paper introduces passive wireless telemetry based operation for high frequency acoustic sensors. The focus is on the development, fabrication, and evaluation of wireless, batteryless SAW-IDT MEMS microphones for biomedical applications. Due to the absence of batteries, the developed sensors are small and as a result of the batch manufacturing strategy are inexpensive which enables their utilization as disposable sensors. A pulse modulated surface acoustic wave interdigital transducer (SAW-IDT) based sensing strategy has been formulated. The sensing strategy relies on detecting the ac comp

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6

Krasny, Leonid. "Speech recognition using microphone antenna array." Journal of the Acoustical Society of America 119, no. 2 (2006): 690. http://dx.doi.org/10.1121/1.2174515.

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7

Romero, Daniel, and Roberto Lopez-Valcarce. "Spectrum Sensing for Wireless Microphone Signals Using Multiple Antennas." IEEE Transactions on Vehicular Technology 63, no. 9 (2014): 4395–407. http://dx.doi.org/10.1109/tvt.2014.2316513.

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8

Rohde, Charles A., and Christina J. Naify. "Detecting acoustic chirality with matched metamaterial vortex wave antennas." Journal of the Acoustical Society of America 154, no. 2 (2023): 721–29. http://dx.doi.org/10.1121/10.0020533.

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ABSTRACT Acoustic communications often have limited data rates because of the intrinsically low frequencies. Exploring new spatial modes to increase data bandwidth at fixed frequency is a possible solution to this problem. Here, we demonstrate acoustic wave chirality transmission between two reciprocal metamaterial vortex wave antennas, generating and sensing transmitted acoustic wave chirality through the sub-wavelength geometry of the system. By adding an acoustic leaky wave surface to a ring resonator waveguide, acoustic vortex waves with positive or negative integer mode chirality are inde

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9

Blanchard, Torea, Jean-Hugh Thomas, and Kosai Raoof. "Acoustic Signature Analysis for Localization Estimation of Unmanned Aerial Vehicles Using Few Number of Microphones." MATEC Web of Conferences 283 (2019): 04002. http://dx.doi.org/10.1051/matecconf/201928304002.

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In recent years, the current technological improvements of Unmanned Aerial Vehicles (UAV) have allowed more and more efficient use for applications ranging from simple amateur shooting to more professional tasks. Being handy, drones can easily fly near sensitive sites, such as power plants, airports or ministries. It is therefore necessary to develop systems able to keep watch such sites. However, the size and the composition of these devices make optical or electromagnetic systems inefficient for their detection. This study proposes an alternative exploiting the sound wave emitted by their mo

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10

DE BONO, Emanuele, Manuel COLLET, Morvan OUISSE, et al. "Electroacoustic Liner for tonal and broadband noise attenuation of turbofans." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 7 (2024): 4853–58. http://dx.doi.org/10.3397/in_2024_3514.

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The new generation of Ultra-High-By-Pass-Ratio (UHBR) turbofan engine while considerably reducing fuel consumption, threatens higher noise levels at low frequencies because of its larger diameter, lower number of blades and rotational speed. This is accompanied by a shorter nacelle, leaving less available space for acoustic treatments. Therefore, alternative solutions to classic liners are required. The SALUTE H2020 project has taken up this challenge, proposing electro-active acoustic liners, made up of loudspeakers (actuators) and microphones (sensors). The electro-active means allow to prog

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11

Wielgus, Agnieszka, and Bogusław Szlachetko. "A General Scheme of a Branch-and-Bound Approach for the Sensor Selection Problem in Near-Field Broadband Beamforming." Sensors 24, no. 2 (2024): 470. http://dx.doi.org/10.3390/s24020470.

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This paper is devoted to the sensor selection problem. A broadband receiver beamforming working in a near-field is considered. The system response should be as close as possible to the desired one, which is optimized in the sense of L2 norm. The problem considered is at least NP-hard. Therefore, the branch-and-bound algorithm is developed to solve the problem. The proposed approach is universal and can be applied not only to microphone arrays but also to antenna arrays; that is, the methodology for the generation of consecutive solutions can be applied to different types of sensor selection pr

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12

Caronna, Gaetano, Ivan Roselli, and Pierluigi Testa. "Modeling of phased antenna array of about 500 microphones, detecting landing airplanes." Journal of the Acoustical Society of America 120, no. 5 (2006): 3218–19. http://dx.doi.org/10.1121/1.4788172.

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13

Berry, Alain. "Assessment of acoustical materials sound absorption coefficient under oblique incidence plane wave and diffuse field using a virtual source antenna." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 267, no. 1 (2023): 53–56. http://dx.doi.org/10.3397/no_2023_0014.

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The measurement of the absorption coefficient of acoustic materials is usually performed in an impedance tube under normal incidence on a small sample, or in a reverberant room under diffuse field incidence on a large sample of material. Both methods are prone to well-documented experimental limitations and errors. The approach proposed here uses a virtual source antenna (a point source moved at successive positions) over a material sample typically 1 to 4 m2 in size, and a fixed microphone pair directly above the material surface. Several methods have been tested to reconstruct the absorption

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14

Fredianelli, Luca, Marco Bernardini, Lara Ginevra Del Pizzo, Francesca Tonetti, Francesco Fidecaro, and Gaetano Licitra. "Acoustic source localization in ports with different beamforming algorithms." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, no. 5 (2023): 2702–11. http://dx.doi.org/10.3397/in_2022_0377.

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Acoustic cameras are used to investigate the origin of a noise and localize it on video for a couple of decades. This was made possible by applying beamforming techniques to the acoustic signals simultaneously acquired by a microphone array. The number of scientists working on improving the efficiency and accuracy of this technique increased over the years, leading to the design and production of different shapes for the antenna and microphone array. Moreover, in the last years many different algorithms for beamforming techniques have been published to improve the original "Delay and Sum" meth

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15

Maciel, Rogerio Andrade, and Cesar Augusto Castro. "OBJETOS DE COMUNICAÇÃO E ESCOLARES NO SISTEMA EDUCATIVO RADIOFÔNICO DE BRAGANÇA - PARÁ (1957-1977)." Cadernos de Pesquisa 27, no. 3 (2020): 399. http://dx.doi.org/10.18764/2178-2229.v28n3p399-419.

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O presente artigo tem como objetivo analisar os objetos de comunicação e escolares no Sistema Educativo Radiofônico de Bragança, Estado do Pará, (1957-1977). A tessitura metodológica é constituída pela abordagem da Nova História Cultural que se estabelece enquanto campo teórico e metodológico das representações. Diante disso, constatou-se que os objetos de comunicação e escolares localizavam-se em diferentes instituições: o microfone foi identificado na Rádio Educadora; o gravador foi encontrado no Escritório Central do SERB; as antenas e os transmissores foram identificados nas casas dos tran

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16

Felis-Enguix, Ivan, Jorge Otero-Vega, María Campo-Valera, I. Villó-Pérez, and J. L. Gómez-Tornero. "Practical Aspects of Acoustic Leaky-Wave Antennas Applied to Underwater Direction Finding." Engineering Proceedings 2, no. 1 (2020): 93. http://dx.doi.org/10.3390/ecsa-7-08218.

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Acoustic leaky-wave antennas (ALWAs) have demonstrated the capacity to steer directive sound waves in frequency-dependent directions, due to the inherent dispersive radiation characteristic of leaky modes. Compared to more conventional uniform linear array (ULA) acoustic traducers for electronic beam steering (which rely on multiple sensors), the ALWA allows for single microphone operation. Thus, ALWAs offer a direct mechanism to scan a directive acoustic beam in the angular space by simply sweeping the operating frequency of the acoustic signal, which envisions cost-efficient single-transduce

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17

MASSON, Florent, Xavier WATREMEZ, Sylvain LEVENT, Julien PREUILH, and Laetitia URFELS. "How artificial intelligence applied to sound recognition can help gas leak detection in acoustically complex environments?" INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 3 (2024): 8515–26. http://dx.doi.org/10.3397/in_2024_4110.

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From production to storage and transport, detecting leaks of flammable gases is a major challenge, particularly in terms of occupational safety and health, and environmental considerations. The emergence of hydrogen as an energy source makes acoustic-based technologies a key element in this value chain. For these reasons, Metravib Engineering, in collaboration with the R&D Safety Project of TotalEnergies One Tech, has been developing since 2019 the AGLED system, for the early detection, localization and classification of these leaks. The system performs acoustic detection in the audible fr

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18

Ester Risanis Travelya and Desmira Desmira. "Sistem Penyiaran Broadcasting Programa 1 (91.2 Fm) di Radio Republik Indonesia Jakarta Pusat." Jupiter: Publikasi Ilmu Keteknikan Industri, Teknik Elektro dan Informatika 2, no. 4 (2024): 47–55. http://dx.doi.org/10.61132/jupiter.v2i4.367.

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Radio is a mass media that is still used by many people as a means of communication, such as listening to songs, informing news and others. One of the radio stations that still exists and is developing to this day is Radio Republik Indonesia, which is overseen by the government, which can now be accessed via available radio and websites so that it makes it easier for listeners to listen to and watch the news and can be accessed anywhere. The author conducted research at Radio Republik Indonesia in the Central Jakarta section using qualitative research methods where the author went directly to

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19

Maniglia, Anthony J., Wen H. Ko, Steven L. Garverick, et al. "Semi-implantable Middle Ear Electromagnetic Hearing Device for Sensorineural Hearing Loss." Ear, Nose & Throat Journal 76, no. 5 (1997): 333–41. http://dx.doi.org/10.1177/014556139707600510.

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A semi-implantable middle ear electromagnetic hearing device (SIMEHD) is proposed for limited clinical trial in adult patients to evaluate the implantable hearing device for moderate to severe sensorineural hearing loss. Food and Drug Administration (FDA) investigational device exemption (IDE) approval has been granted (May 1996) for clinical trials. The implant unit has been evaluated acutely and chronically in animals (cats) with excellent results. Five cats undergoing chronic implantation were allowed to survive an average of 9.6 months, showing that the SIMEHD is biocompatible, functional

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20

Rodionov, A. A., and V. Yu Semenov. "FINDING NOISE DIRECTION FROM ACOUSTIC SOURCES USING MICROPHONE ANTENNA ARRAYS IN THE PRESENCE OF INTENSE INTERFERENCE." Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika 66, no. 4 (2023): 253. https://doi.org/10.52452/00213462_2023_66_04_253.

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21

Long, Guang Li. "Design of GPRS Based on MCU STC12C5A60S2." Applied Mechanics and Materials 130-134 (October 2011): 4028–31. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.4028.

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The MCU has the smaller volume, low cost, face control, antijamming ability strong and so on merits, GPRS is based on the GSM development foundation in data traffic. one kind of GPRS system Has been designed by using MCU STC12C5A60S2, it including correspondence transformation connection, SIM300 module, MCU, display circuit, keyboard electric circuit, RS232 exterior serial communication connection and so on. The related hardware welding on the PCB, the software programming after-burning writes in the MCU, inserts the liquid crystal display monitor and the SIM card, joins the receiver and the m

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22

El Halaoui, Mustapha, Abdelmoumen Kaabal, Hassan Asselman, Saida Ahyoud, and Adel Asselman. "Multiband Planar Inverted-F Antenna with Independent Operating Bands Control for Mobile Handset Applications." International Journal of Antennas and Propagation 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/8794039.

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A new compact multiband PIFA (Planar Inverted-F Antenna) for mobile handset is proposed in this article. The proposed PIFA has a simple geometry with four slots integrated in the radiating patch and ground plane. The PIFA occupies a small volume of 51 × 14 × 7.2 mm3 and is placed on the top portion of mobile phone. The optimized PIFA is worked in the 790 MHz band (737–831 MHz), the 1870 MHz band (1794–1977 MHz), the 2550 MHz band (2507–2615 MHz), and the 3400 MHz band (3341–3545 MHz), to cover LTE700, LTE800, DCS1800, PCS1900, LTE1800, LTE1900, LTE2500, and WIMAX3400 bands. Each of the four op

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23

Al Afkar, Naufal Baihaqi. "Computational investigation of various wedges electromagnetic wave absorbers on anechoic chambers." SINERGI 26, no. 1 (2022): 91. http://dx.doi.org/10.22441/sinergi.2022.1.012.

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The anechoic chamber is closely related as a device for precisely measuring various acoustic characteristics. Anechoic chambers room conditions controlled to produce a sound field-free space. This study focused on testing various commercial wedges such as Eckel, diamond, pyramidal, and oblique pyramidal. The test was done by varying the elevation of an incident angle at 0°-85° with a stepping distance is 5°. This study is analyzed at 1-3 GHz frequency. This research was conducted based on a computational analysis using the finite element method on electromagnetic wave physics interfaces using

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24

Vidaña-Vila, Ester, Joan Navarro, Cristina Borda-Fortuny, Dan Stowell, and Rosa Ma Alsina-Pagès. "Low-Cost Distributed Acoustic Sensor Network for Real-Time Urban Sound Monitoring." Electronics 9, no. 12 (2020): 2119. http://dx.doi.org/10.3390/electronics9122119.

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Continuous exposure to urban noise has been found to be one of the major threats to citizens’ health. In this regard, several organizations are devoting huge efforts to designing new in-field systems to identify the acoustic sources of these threats to protect those citizens at risk. Typically, these prototype systems are composed of expensive components that limit their large-scale deployment and thus reduce the scope of their measurements. This paper aims to present a highly scalable low-cost distributed infrastructure that features a ubiquitous acoustic sensor network to monitor urban sound

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25

Defer, E., J. P. Pinty, S. Coquillat, et al. "An overview of the lightning and atmospheric electricity observations collected in southern France during the HYdrological cycle in Mediterranean EXperiment (HyMeX), Special Observation Period 1." Atmospheric Measurement Techniques 8, no. 2 (2015): 649–69. http://dx.doi.org/10.5194/amt-8-649-2015.

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Abstract. The PEACH project (Projet en Electricité Atmosphérique pour la Campagne HyMeX – the Atmospheric Electricity Project of the HyMeX Program) is the atmospheric electricity component of the Hydrology cycle in the Mediterranean Experiment (HyMeX) experiment and is dedicated to the observation of both lightning activity and electrical state of continental and maritime thunderstorms in the area of the Mediterranean Sea. During the HyMeX SOP1 (Special Observation Period) from 5 September to 6 November 2012, four European operational lightning locating systems (ATDnet, EUCLID, LINET, ZEUS) an

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26

Derouiche, Abbassia, Nacer Hamzaoui, and Taoufik Boukharouba. "Localization and Identification of Vibroacoustic Sources of Gear Transmission Mechanism by Inverse Frequency Response Function." Applied Mechanics and Materials 232 (November 2012): 437–44. http://dx.doi.org/10.4028/www.scientific.net/amm.232.437.

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Our contribution in this work is to detect, localize and quantify the noise sources radiated by a spur gear transmission mechanism. The imaging technique is used; it is based on the acoustic inverse frequency response function (IFRF). The IFRF is based on the inversion of the transfer matrix built between the source points represented by their complex source strengths and listening points represented by the complex pressures measured by the hologram. The measurements were performed in a semi-anechoic room where the floor is concrete and the walls are covered with glass wool. The complex acoust

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27

Besset, Sebastien, David Lenoir, and Jean-Jacques Sinou. "Brake Squeal Investigations Based on Acoustic Measurements Performed on the FIVE@ECL Experimental Test Bench." Applied Sciences 13, no. 22 (2023): 12246. http://dx.doi.org/10.3390/app132212246.

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Radiated noise is a major topic of interest regarding the brake squeal phenomenon as it is directly linked to the noise generated which can be potentially detrimental to user comfort and perception. However, very few studies offer in-depth and comprehensive insight into the analysis and understanding of acoustic noise during squeal events. This study is intended to provide an original contribution to this issue by investigating acoustic phenomena occurring during the squeal phenomenon via a digital antenna composed of 117 microphones. Experiments are performed on the Friction-Induced Vibration

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28

Kopiev, V. F., M. Yu Zaytsev, S. A. Velichko, A. V. Dolotovsky, and V. I. Sheviakov. "Determination of the Aerodynamic Noise of the Main Elements of a Full-Scale Aircraft Using a Multi-Microphone Antenna and Beamforming Algorithms." Doklady Physics 67, no. 9 (2022): 315–27. http://dx.doi.org/10.1134/s1028335822090099.

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29

Astapenia, Volodymyr, Maksym Martseniuk, Svitlana Shevchenko, Pavlo Skladannyi, and Yevhen Martseniuk. "EXPERIMENTAL INVESTIGATIONS OF THE INFLUENCE OF SCREENS AND PROTECTIVE EQUIPMENT ON THE LEVEL OF ACOUSTIC SIGNAL IN A ROOM WITH GLASS AND METAL PLASTIC." Cybersecurity: Education, Science, Technique 12, no. 4 (2021): 117–31. http://dx.doi.org/10.28925/2663-4023.2021.12.117131.

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In the digital stage of world development, information is constantly expanding its facets. That is why the exchange of information is a leading component of constant change in life. Although humanity is gradually moving to the use of electronic technology, acoustic information still plays a key role in information circulation. This applies to official communication in public institutions up to the highest level, business contacts in commercial structures and private communication between people. The process of transmitting information in acoustic form has dangerous consequences. The use of app

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30

Costa, Alice Lemos, Cassiane Furlan-Lopes, Fernando Augusto Bertazzo-Silva, et al. "Mycophagy of Attini Ants (Hymenoptera, Formicidae, Myrmicinae) with Agaricales Mushrooms (Basidiomycota, Agaricomycetes) at Riparian Zone in Southern Brazil." Brazilian Journal of Animal and Environmental Research 5, no. 4 (2022): 3935–60. http://dx.doi.org/10.34188/bjaerv5n4-039.

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Attini ants (Hymenoptera, Formicidae, Myrmicinae) have great diversity in exploiting food resources. However, little is known about the mycophagy involving Agaricales fungi (Basidiomycota, Agaricomycetes). Moreover, these associations are of paramount importance in riparian zones, as the interaction among soil, fauna and flora is fundamental to the maintenance of these environments. Thus, the aim of this study was to describe cases of mycophagy between ants and fungi in order to understand how these associations occur in riparian zones. To this, collections were made between 2021-2022 in the v

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31

Defer, E., J. P. Pinty, S. Coquillat, et al. "An overview of the lightning and atmospheric electricity observations collected in Southern France during the HYdrological cycle in Mediterranean EXperiment (HyMeX), Special Observation Period 1." Atmospheric Measurement Techniques Discussions 7, no. 8 (2014): 8013–65. http://dx.doi.org/10.5194/amtd-7-8013-2014.

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Abstract. The PEACH (Projet en Electricité Atmosphérique pour la Campagne HyMeX – the Atmospheric Electricity Project of HyMeX Program) project is the Atmospheric Electricity component of the HyMeX (Hydrology cycle in the Mediterranean Experiment) experiment and is dedicated to the observation of both lightning activity and electrical state of continental and maritime thunderstorms in the area of the Mediterranean Sea. During the HyMeX SOP1 (Special Observation Period; 5 September–6 November 2012), four European Operational Lightning Locating Systems (OLLSs) (ATDNET, EUCLID, LINET, ZEUS) and t

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32

Didenkulov, I. N., A. I. Malekhanov, and V. V. Chernov. "ACOUSTIC OSCILLATIONS IN A DEEP WELLBORE GENERATED BY ITS ELASTIC DEFORMATIONS IN THE FIELD OF SEISMIC WAVES FROM A REMOTE SOURCE*2." Problems of Strength and Plasticity 86, no. 2 (2024): 129–38. http://dx.doi.org/10.32326/1814-9146-2024-86-2-129-138.

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This paper analyzes the possibilities of an original approach to constructing a distributed seismic monitoring system based on a stationary seismoacoustic propagation path of a sounding signal. Such a stationary path can be formed by a powerful source of low-frequency vibration oscillations located on the earth's surface, and a signal recording point located tens (or more) kilometers away from it. It is proposed to use hydroelectric power station units as a powerful vibration source, which have a typical mass of several hundred tons and create vibration signals in the environment of the earth'

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33

Vetter, K. J., M. Beretta, C. Capelli, et al. "Improving the performance of cryogenic calorimeters with nonlinear multivariate noise cancellation algorithms." European Physical Journal C 84, no. 3 (2024). http://dx.doi.org/10.1140/epjc/s10052-024-12595-y.

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AbstractState-of-the-art physics experiments require high-resolution, low-noise, and low-threshold detectors to achieve competitive scientific results. However, experimental environments invariably introduce sources of noise, such as electrical interference or microphonics. The sources of this environmental noise can often be monitored by adding specially designed “auxiliary devices” (e.g. microphones, accelerometers, seismometers, magnetometers, and antennae). A model can then be constructed to predict the detector noise based on the auxiliary device information, which can then be subtracted

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34

Krivosheikin, A. V., and S. V. Perelygin. "Microphone Array for Directional Acoustic Antenna Implementation." Izvestiâ vysših učebnyh zavedenij. Priborostroenie, March 23, 2015, 221–25. http://dx.doi.org/10.17586/0021-3454-2015-58-3-221-225.

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35

Gonçalves Licursi de Mello, Rafael, Anne Claire Lepage, and Xavier Begaud. "Taming Fabry–Pérot resonances in a dual-metasurface multiband antenna with beam steering in one of the bands." Scientific Reports 13, no. 1 (2023). http://dx.doi.org/10.1038/s41598-023-36828-4.

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AbstractMetasurfaces are artificial materials that can provide properties not readily available in nature for the interaction with acoustic, elastodynamic, or electromagnetic waves. In Electromagnetics, metasurfaces allow particular functionalities to antennas, which in turn lately have been increasingly pushed to a multiband operation. To fully exploit metasurfaces’ capabilities, the use of a metasurface reflector and a metasurface superstrate surrounding a radiating element in multiband antennas is interesting. However, such topology generally creates multiple reflections inside the formed c

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Buzov, A. L., P. I. Bondar, A. V. Karlov, M. A. Minkin, and M. A. Khairullin. "UHF antenna complex with polarization adaptation." Radioengineering, June 6, 2024. http://dx.doi.org/10.18127/j00338486-202406-03.

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Formulation of the problem. With the development of the telecommunications industry and the growth in the number of subscribers, there is a need to more efficiently use the microphone frequency resource and increase the capacity in the mid-frequency UHF network. Thus, a promising approach to the UHF antenna complex is polarization adaptation, which makes it possible to compensate for the negative influence of various objects on the propagation of paths, such as effects of influence, multipath, depolarization, etc. A model of an antenna complex with polarization adaptation has been developed. I

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Zhang, Nan, Tingyuan Wang, Guanghao Li, et al. "Detecting terahertz wave by microphone based on the photoacoustic effect in graphene foam." Nanophotonics, June 14, 2023. http://dx.doi.org/10.1515/nanoph-2023-0026.

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Abstract Terahertz (THz) wave plays important roles in the research of material properties, the non-invasive human security check and the next generation wireless communication. The progress of the scientific and technological applications of THz wave is strongly dependent on the improvement of THz detectors. Here a novel THz wave detection scheme is proposed in which the THz radiation is detected by an audible microphone based on the photo-thermo-acoustic (PTA) effect in graphene foam. Thanks to the room-temperature broadband electromagnetic absorption characteristics of graphene foam and the

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38

Rodionov, A. A., and V. Yu Semenov. "Noise Direction Finding of Acoustic Sources by Using Microphone Antenna Arrays in the Presence of Intense Interference." Radiophysics and Quantum Electronics, February 8, 2024. http://dx.doi.org/10.1007/s11141-024-10289-9.

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39

Gallo, Erica, Julien de Decker, Andrea Bresciani, Pauline Haezebrouck, Emanuele Garone, and Christophe Schram. "Development and commissioning of an aeroacoustic test bench for the investigation of single and coaxial propeller noise." Acta Acustica, January 9, 2025. https://doi.org/10.1051/aacus/2024085.

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This paper describes the design and commissioning of an aeroacoustic test rig for the study of single and coaxial propeller propulsive systems. The size of the propellers matches typical drone applications. The experimental setup, designed and commissioned at the ALCOVES anechoic laboratory of von Karman Institute for Fluid Dynamics, is equipped with aerodynamic sensors for performance analysis and is surrounded by a microphone antenna for the characterization of the noise level and directivity. The facility permits varying different parameters such as the longitudinal distance between the rot

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40

Christophe, Julien, Julien de Decker, and Christophe Schram. "Jet Noise and Wing Installation Effects of Circular, Beveled and Rectangular Nozzles." Flow, Turbulence and Combustion, February 26, 2024. http://dx.doi.org/10.1007/s10494-024-00533-7.

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AbstractWith the growth of modern turbofan engines, their integration under the wing becomes challenging and induces aerodynamic and acoustic interactions between the jet exhaust and the airframe. Jet noise reduction techniques have been widely studied over the past decades but their efficiency has still to be demonstrated once installed. The present lab-scale jet experiments at Mach 0.6 compare the noise radiated by beveled and rectangular installed nozzles to circular ones on a quarter-sphere radiation map using a microphone antenna. For all radiation angles, modified nozzles show an amplitu

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41

Shchekachykhina, Kateryna Andriivna, and Pavlo Vasylovych Popovych. "Application of Network Technologies in Low-Budget Television Production." Microsystems, Electronics and Acoustics 27, no. 3 (2022). http://dx.doi.org/10.20535/2523-4455.mea.268974.

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The article considers the classical scheme of the broadcast news studio and the principle of operation of the television broadcasting system on the example of the standard of the international digital television system, which is the reference model of terrestrial digital television transmission. The structural scheme of the broadcast news studio is given, the functions of each block of the studio and the principle of their work are described. The diagram of the digital television system shows how the signal from the studio passes through the stages of encoding and modulation to the broadcastin

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42

Wilken, Rowan. "Walkie-Talkies, Wandering, and Sonic Intimacy." M/C Journal 22, no. 4 (2019). http://dx.doi.org/10.5204/mcj.1581.

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IntroductionThis short article examines contemporary artistic use of walkie-talkies across two projects: Saturday (2002) by Sabrina Raaf and Walk That Sound (2014) by Lukatoyboy. Drawing on Dominic Pettman’s notion of sonic intimacy, I argue that both artists incorporate walkie-talkies as part of their explorations of mediated wandering, and in ways that seek to capture sonic ambiances and intimacies. One thing that is striking about both these works is that they rethink what’s possible with walkie-talkies; both artists use them not just as low-tech, portable devices for one-to-one communicati

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