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Journal articles on the topic 'Acoustic filling'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Glover, Jennifer, and Dan O'Boy. "Acoustic space filling curve metamaterials for grazing flow in Jet engine inlets." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 6 (2021): 394–406. http://dx.doi.org/10.3397/in-2021-1458.

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Acoustic metamaterials research has grown exponentially in the past 10 years driven by the advances in manufacturing and an increased understanding of damaging environment noise. 2020 was the first noise reduction target as set by Advisory Council for Aircraft Research and Innovation in Europe with a relative 50% decrease. This was missed by current Jet engine noise control technology; however, metamaterials offer an encouraging alternative. Space Filling Curves (SFC) have the potential to provide a lightweight, thin, high performance acoustic liner. SFC have a history in mathematical geometry

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2

Glover, Jennifer, and Dan O'Boy. "Hybrid space filling curve metamaterials for transmissive flow in Jet Engine inlets." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, no. 7 (2023): 491–502. http://dx.doi.org/10.3397/in_2022_0069.

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Acoustic metamaterials research has grown exponentially in the past 10 years driven by the advances in manufacturing and an increased understanding of damaging environment noise. 2050 was the first noise reduction target as set by Advisory Council for Aircraft Research and Innovation in Europe with a relative 65% decrease. This ambitions target will not be met by current engine noise control technology; however, metamaterials offer an encouraging alternative. Space Filling Curves (SFC) have the potential to provide a lightweight, thin, high performance acoustic liner. SFC have a history in mat

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3

Krishna, Arvind, Steven R. Craig, Chengzhi Shi, and V. Roshan Joseph. "Inverse design of acoustic metasurfaces using space-filling points." Applied Physics Letters 121, no. 7 (2022): 071701. http://dx.doi.org/10.1063/5.0096869.

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Acoustic metasurfaces are two-dimensional materials that impart non-trivial amplitude and phase shifts on incident acoustic waves at a predetermined frequency. While acoustic metasurfaces enable extraordinary wavefront engineering capabilities, they are not developed well enough to independently control the amplitude and phase of reflected and transmitted acoustic waves simultaneously, which are governed by their geometry. We aim to solve the inverse design problem of finding a geometry to achieve a specified set of acoustic properties. The geometry is modeled by discretizing the continuous sp

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Begum, Hasina, and Kirill V. Horoshenkov. "Acoustical Properties of Fiberglass Blankets Impregnated with Silica Aerogel." Applied Sciences 11, no. 10 (2021): 4593. http://dx.doi.org/10.3390/app11104593.

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It is known that aerogel impregnated fibrous blankets offer high acoustic absorption and thermal insulation performance. These materials are becoming very popular in various industrial and building applications. Although the reasons for the high thermal insulation performance of these materials are well understood, it is still largely unclear what controls their acoustic performance. Additionally, only a small number of publications to date report on the acoustical properties of fibrous blankets impregnated with powder aerogels. There is a lack of studies that attempt to explain the measured a

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Xu, Gui-yang, Chun-guang Wang, Shao-qing Hu, Jian-Liang Gong, and Zhe Deng. "Investigation on the Time Error of Detonation Acoustic in Process of Formation and Propagation." International Journal of Turbo & Jet-Engines 36, no. 4 (2019): 391–99. http://dx.doi.org/10.1515/tjj-2018-0011.

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Abstract The time error of detonation acoustic in process of detonation formation and propagation in a multi-cycle gas-liquid two-phase pulsed detonation engine is experimentally investigated. Results from the tests show that before the detonation wave escapes through the open-end of PDE tube, the maximum average arrival time error of detonation acoustic is achieved in the process of overdriven detonation. After detonation wave exists of PDE tube, arrival time error at 0 deg is greater than the other directivity angles in all distances and increases dramatically first and then almost stays at

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6

Huang, Hongpu, Zhenlin Ji, and Zhuoliang Li. "Influence of perforation and sound-absorbing material filling on acoustic attenuation performance of three-pass perforated mufflers." Advances in Mechanical Engineering 10, no. 1 (2018): 168781401774801. http://dx.doi.org/10.1177/1687814017748012.

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The finite element method is employed to calculate the transmission loss of three-pass perforated reactive and hybrid mufflers. The effects of perforated tubes and bulkheads on the transmission loss of three-pass reactive mufflers are investigated numerically. Two types of hybrid mufflers are considered, and the effects of sound-absorbing material filling and packed outlet tube on the acoustic attenuation performance of mufflers are analyzed. The perforations of the tubes and bulkheads and sound-absorbing material filling are demonstrated to have significant influence on the acoustic attenuati

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7

Metzenmacher, Michael, Alexander Beugholt, Dominik Geier, and Thomas Becker. "Combined Longitudinal and Surface Acoustic Wave Analysis for Determining Small Filling Levels in Curved Steel Containers." Sensors 22, no. 9 (2022): 3476. http://dx.doi.org/10.3390/s22093476.

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Measurement of the small filling levels in closed steel container systems is still a challenge. Ultrasound, however, is a sensitive and non-invasive technique and is suitable for online monitoring. This study describes a new ultrasonic sensor system for sensing small filling levels using longitudinal and surface acoustic wave analysis. The sensor system consists of one transducer for the longitudinal wave analysis and two transducers for the longitudinal and surface acoustic wave analysis. All transducers were mounted to the outer wall of the steel container, ensuring non-invasiveness, and a f

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8

Cabe, Patrick A., and John B. Pittenger. "Human sensitivity to acoustic information from vessel filling." Journal of Experimental Psychology: Human Perception and Performance 26, no. 1 (2000): 313–24. http://dx.doi.org/10.1037/0096-1523.26.1.313.

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9

LI, ZHENGWEI, ZHIWU ZU, BO ZHANG, and JIUCHUN YAN. "Cavitation Characteristics in Ultrasonic Soldering and the Erosion Effect." Welding Journal 103, no. 04 (2024): 160–74. http://dx.doi.org/10.29391/2024.103.023.

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In this work, the cavitation characteristics of the solder sonocapillary action during ultrasonic soldering were studied by a high-speed camera. The effects of ultrasonic power and time on the acoustic pressure, cavitation characteristics, and erosion effects were also investigated. Results showed that cavitation occurred throughout the entire sonocapillary action. Two kinds of bubble structures were observed. The steady bubbles had large sizes and long life periods. The transient bubbles had small sizes and short life periods. The steady bubbles preferentially appeared at the primary filling

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10

Bublikov, A. V., P. I. Pilov, N. S. Pryadko, Yu A. Papaika, and K. V. Ternova. "Automatic control of jet grinding on the basis of acoustic monitoring of mill operating zones." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 4 (2021): 29–34. http://dx.doi.org/10.33271/nvngu/2021-4/029.

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Purpose. Increasing the jet mill productivity by use of automatic control of the grinding chamber filling level based on the acoustic monitoring results of the jet grinding process. Methodology. Simulation is performed in MATLAB. Acoustic signals of the mill operating zones are used to determine the grinding process parameters. Findings. A simulation model of the automatic jet mill control system is created, which takes into account the inertia of material flows in the grinding chamber and classifier, as well as the main disturbing influences on the process of forming the mill output flow. To

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11

Huang, Chongjie, Wen He, Bokai Lu, Manman Wang, Shenhai Li, and Changbo Xiao. "Study on Acoustic Emission and Coda Wave Characteristics of Layered Cemented Tailings Backfill under Uniaxial Compression." Minerals 12, no. 7 (2022): 896. http://dx.doi.org/10.3390/min12070896.

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The paper analyzes the effects of filling times and filling interval time on the acoustic emission characteristics and coda wave characteristics of layered cemented tailings backfill under uniaxial compression and, to a certain extent, enriches the study of layered cemented tailings backfill in this field. The work aims to monitor the early warning of layered cemented tailings backfill with different layering factors during deformation and damage by the changing law of acoustic emission and ultrasonic signals. By conducting uniaxial compression tests, acoustic emission, and ultrasonic tests of

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12

Gao, Ziran, Dong Wu, Hongliang Wu, et al. "Numerical Simulation Study on the Influence of Fracture on Borehole Wave Modes: Insights from Fracture Width, Filling Condition, and Acoustic Frequency." Sensors 24, no. 12 (2024): 3955. http://dx.doi.org/10.3390/s24123955.

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Unconventional reservoirs, such as shale and tight formations, have become increasingly vital contributors to oil and gas production. In these reservoirs, fractures serve as crucial spaces for fluid migration and storage, making their precise assessment essential. Array acoustic logging stands out as a pivotal method for evaluating fractures. To investigate the impact of fracture width, fracture-filling conditions, and acoustic frequency on compressional and shear waves, a three-dimensional variable mesh finite difference program was employed for acoustic logging numerical simulation. Firstly,

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Deng, Daiqiang, Jinkuan Fan, Guodong Cao, et al. "Study on Sound Propagation Performance of Mechanized Coal Gangue-Fine Sand Filling Body." Shock and Vibration 2023 (June 5, 2023): 1–10. http://dx.doi.org/10.1155/2023/4904326.

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In the process of continuous and high-intensity mining in soft rock coal mines, high-quality filling treatment is required for the goaf. A nondestructive acoustic velocimetry method is an excellent way to measure the quality of filling body to effectively maintain the rock stability of the mining area and decrease industrial solid waste. In this study, the gangue and fine sand are used as the filling aggregates, and the uniaxial compression test and acoustic wave test are conducted in the cementitious gangue-sand filling body with different gangue-sand ratio. The results show that the longitud

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14

Nikolaev, SV, AV Benin, and AM Popov. "Methodology of the selection of effective dipping and control over the filling depth of open-textured construction materials." Journal of Physics: Conference Series 2131, no. 2 (2021): 022055. http://dx.doi.org/10.1088/1742-6596/2131/2/022055.

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Abstract It is determined that for the combination of the dipping process with the ultrasound control it is necessary to carry out the optimization of the filling speed and the precision of control over the dipping depth, to determine the optimum frequency of the ultrasound emission which satisfies the speed and the dipping measurement precision of the sample with the hydrophobic agent. On the basis of the performed multiobjective optimization, experimental results for the dipping and the control over the dipping stage of porous materials by the solution in the uniform acoustic field alignment

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15

Shidlovskaya, Tetiana A., Tamara V. Shidlovskaya, Nikolay S. Kozak, Kateryna V. Ovsyanik, and Lyubov G. Petruk. "The peculiarities of hemodynamic violations for patients with combat acoustic trauma and violations in the central departments of auditory analyzer in the dynamics of treatment." OTORHINOLARYNGOLOGY No5(5) 2022, No5(5) 2022 (October 31, 2022): 2–9. http://dx.doi.org/10.37219/2528-8253-2022-5-02.

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The active combat actions in our country resulted in the increasing the risk of occurrence of the acoustics trauma, acubarotrauma. There is an increase of number of cases of combat acoustic trauma in servicemen and now this problem acquires a large value. The objective estimation of cerebral hemodynamics in patients with acoustics trauma, got in battle conditions, is a necessary condition for the effective complex treatment of sensorineural violations of hearing in such patients. Aim: the examination of quantitative and qualitative indexes of rheoencephalography before and after the treatment

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16

Song, Yiheng, Haixia Yang, Nanxing Zhu, and Jinxiang Chen. "Experimental Investigation on the Acoustic Insulation Properties of Filled Paper Honeycomb-Core Wallboards." Biomimetics 9, no. 9 (2024): 528. http://dx.doi.org/10.3390/biomimetics9090528.

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Honeycomb plates, due to their multi-cavity structure, exhibit excellent mechanical properties and sound insulation. Previous studies have demonstrated that altering the cell size and arrangement of honeycomb structures impacts their acoustic performance. Based on these findings, this study developed a wallboard structure with enhanced sound insulation by filling the cavities with paper fiber/cement facesheets and designing a stacked core structure. Through the reverberation chamber–anechoic chamber sound insulation experiment under 100–6300 Hz excitation and conducting orthogonal experiments

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17

Collins, Sean P., Christopher J. Lindsell, Michael C. Kontos, et al. "Bedside prediction of increased filling pressure using acoustic electrocardiography." American Journal of Emergency Medicine 27, no. 4 (2009): 397–408. http://dx.doi.org/10.1016/j.ajem.2008.03.014.

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18

Daeva, S. G., A. L. Beskin, and N. N. Trokhachenkova. "Mathematical modeling of monochromatic acoustic wave diffraction on a system of bodies and on flat screens." Journal of Physics: Conference Series 2142, no. 1 (2021): 012002. http://dx.doi.org/10.1088/1742-6596/2142/1/012002.

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Abstract Some problems of diffraction of a monochromatic acoustic wave on surfaces of complex shapes are considered. To solve such problems, an approach is applied, in which the problem is reduced to a boundary hypersingular integral equation, where the integral is understood in the sense of a finite value according to Hadamard. Such approach allows solving diffraction problems both on solid objects and on thin screens. To solve the integral equation, the method of piecewise constant approximations and collocations, developed in the previous works of the author, is used. In the present study,

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19

Wang, Guifeng, Yuanting Wei, Zhenyu Chen, and C. W. Lim. "Controllable subwavelength topological rainbow trapping in water-filling acoustic metamaterials." Applied Acoustics 207 (May 2023): 109366. http://dx.doi.org/10.1016/j.apacoust.2023.109366.

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Pedrosa, Ana M. "NO_Valid." Mathematical and Computer Modelling 57, no. 7-8 (2013): 1970–78. https://doi.org/10.1016/j.mcm.2012.01.021.

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In this work, a finite element approach is presented for modeling sound propagation in perforated dissipative mufflers with non-homogeneous properties. The spatial variations of the acoustic properties can arise, for example, from uneven filling processes during manufacture and degradation associated with the flow of soot particles within the absorbent material. First, the finite element method is applied to the wave equation for a propagation medium with variable properties (outer chamber with absorbent material) and a homogeneous medium (central passage). For the case of a dissipative muffle

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Antebas, Antoine G., Francisco D. Denia, Ana M. Pedrosa, and Francisco J. Fuenmayor. "A finite element approach for the acoustic modelling of perforated dissipative mufflers with non-homogeneous properties." Mathematical and Computer Modelling 57, no. 7-8 (2013): 1970–78. https://doi.org/10.5281/zenodo.10629182.

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In this work, a finite element approach is presented for modeling sound propagation in perforated dissipative mufflers with non-homogeneous properties. The spatial variations of the acoustic properties can arise, for example, from uneven filling processes during manufacture and degradation associated with the flow of soot particles within the absorbent material. First, the finite element method is applied to the wave equation for a propagation medium with variable properties (outer chamber with absorbent material) and a homogeneous medium (central passage). For the case of a dissipative muffle

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22

Kurbasov, M. G. "The Main Causes of Unsatisfactory Indications of the Acoustic Method in the Intervals of Application of Lightweight Cement." Oil and Gas Technologies 129, no. 4 (2020): 39–41. http://dx.doi.org/10.32935/1815-2600-2020-129-4-39-41.

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The acoustic method for assessing the quality of casing cementing is currently one of the most accurate and affordable assessment methods. Acoustic logging is based on the excitation in a fluid filling a well of a pulse of elastic vibrations and registration of waves transmitted through a cement stone at a given distance from the emitter at one or more points on the axis of the well. The article discusses the main errors that can be made during the acoustic logging, the possible causes of unsatisfactory readings and provides recommendations for further work.

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23

Wolfram, Frank, and Thomas G. Lesser. "Complete Lung Ultrasound Using Liquid Filling: A Review of Methods Regarding Sonographic Findings and Clinical Relevance." Applied Sciences 10, no. 2 (2020): 574. http://dx.doi.org/10.3390/app10020574.

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(200w) Lung ultrasound (LUS) is widely used for the diagnosis of pulmonary diseases such as solid nodules and consolidations in contact with the pleural cavity. However, sonography for processes of central disease remains impaired due to total sound reflection at the air tissue interfaces in the ventilated lung. These acoustic barriers can be overcome by replacing intra-alveolar air with liquid. Such filling has been reported using perfluorocarbon, saline or emulsions out of those. In order to achieve acoustic access enabling the use of LUS, complete gas free content is required. Such lung tis

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24

Murčinková, Zuzana, Pavel Adamčík, and Jozef Živčák. "Re-Design of Machine Tool Joint Components Based on Polymer Fillings for High-Speed Performance." Materials 14, no. 22 (2021): 6913. http://dx.doi.org/10.3390/ma14226913.

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In this paper, we report the results of an experimental study of a re-design approach using filling polymers and particulate composites with a polymer matrix, thus creating a macroscopic hybrid structure. The re-design is focused on the joint of a textile machine. It is a re-design of already existing machine parts of a joint in order to increase the damping of components, reduce the amplitudes of high-frequency vibrations and acoustic emission for high-speed operation of textile rotors, and to compare individual structural modifications of the rotor housing body and absorber of high-speed tex

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Luan, Hengjie, Qingzhai Shi, Changsheng Wang, et al. "Experimental Study on Shear Characteristics of Filled Joints Anchored by Basalt Fiber-Reinforced Polymer Materials." Materials 18, no. 10 (2025): 2393. https://doi.org/10.3390/ma18102393.

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Filled joints are widely found in natural rock masses and are one of the main factors causing rock mass engineering instability. The use of bolts can effectively control the shear slip of filled joints, research on bolts filled joints in the filling degree, and other key parameters of the influence of the law, to ensure the stability of the engineering rock body is of great significance. This paper presents shear experiments on bolted filled joints of Basalt Fiber-Reinforced Polymer (BFRP) materials with different joint roughness and filling degrees, while acoustic emission technology monitors

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26

Thorsteinsson, Gunnar, and Daniel A. Steingart. "When Wetting Spills into Formation: Using Acoustics to Probe Electrolyte Dynamics in Lithium Ion Batteries." ECS Meeting Abstracts MA2024-02, no. 4 (2024): 411. https://doi.org/10.1149/ma2024-024411mtgabs.

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Wetting is a critical step of lithium-ion battery manufacturing. Following electrolyte filling and sealing, the electrolyte percolates through the porous matrix of the electrodes to encapsulate and penetrate the active particles. This impregnation facilitates necessary ionic conductivity and passivation on formation, resulting in maximum capacity retention during cycling. Unfortunately, incumbent electrochemical techniques fail to fully elucidate this process, particularly in multilayered cells. In this work, we leverage acoustics to demonstrate that the wetting process is not simply a functio

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27

CHEN, SHU, ZHIWU XU, ZHENGWEI LI, ZHONGWEI MA, LIN MA, and JIUCHUN YAN. "The Horizontal Sonocapillary Effect in UltrasonicAssisted Soldering." Welding Journal 102, no. 6 (2023): 113–24. http://dx.doi.org/10.29391/2023.102.009.

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In this work, the horizontal sonocapillary effect in ultrasonic-assisted soldering was investigated via numerical simulations and experiments. The numerical simulation results indicated that acoustic pressures in the liquid solder exhibited distinct sinusoidal features with negative offsets, forming a negative average acoustic pressure. When the ultrasonic vibrations were transmitted to the lower substrate in the joint clearance, the average acoustic pressures decreased from the acoustic pressure center to the filling front, forming a negative acoustic pressure gradient in the horizontal direc

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Karamanis, Georgios, Jonathan Anderson, Lalitha Parameswaran, et al. "A fluid filled MEMS hydrophone." Journal of the Acoustical Society of America 155, no. 3_Supplement (2024): A293. http://dx.doi.org/10.1121/10.0027549.

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MEMS hydrophones are of interest to provide a small form factor acoustic sensing capability in water. The majority of previous work on MEMS hydrophones (e.g., Bernstein 1997, Moon, 2010, Gu, 2018) use air backed diaphragms in order to provide increased sensitivity. However, this limits the operating depth of the device due to a reduction in the diaphragm burst pressure. In this work we investigate an architecture that has the potential to increase the operating depth by filling the backing cavity with a heavy fluid. We have designed architectures with multiple acoustic ports (Moon, 2010) and c

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Inzhutov, I., P. Melnikov, S. Amelchugov, V. Zhadanov, and V. Purtov. "Investigation of Acoustic Impedance of a New Floor Panel Filling Generation." IOP Conference Series: Materials Science and Engineering 953 (November 27, 2020): 012002. http://dx.doi.org/10.1088/1757-899x/953/1/012002.

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Kachaenko, O. B., L. S. Pal'ko, and N. A. Shul'ga. "Acoustic wave diffraction by an elastic cylindrical shell with viscous filling." Soviet Applied Mechanics 25, no. 7 (1989): 662–67. http://dx.doi.org/10.1007/bf00888317.

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Andreev, I. V., V. M. Muravev та I. V. Kukushkin. "Observation of acoustic edge magnetoplasmons near the filling factor ν = 1". JETP Letters 96, № 8 (2012): 536–40. http://dx.doi.org/10.1134/s0021364012200040.

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Shanglong, He, Zi Yanyang, and Chen Zhenyi. "Research on Dynamics Characteristic of The Filling Liquid Tank." Journal of Physics: Conference Series 2762, no. 1 (2024): 012062. http://dx.doi.org/10.1088/1742-6596/2762/1/012062.

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Abstract The dynamics characteristic of the rocket tank with liquid propellant in it, which takes the large part of a carrier rocket, make a great influence to the whole rocket. The tank of some model was investigated systematically by the PATRAN finite element software. Firstly, it established a finite element modal of the tank and calculated the modal frequency and shape of the empty or filling tank by the virtual fluid mass and acoustic-structure coupling analysis. Then, it contrasted the veracity and applicability of the two methods and investigated how the liquid depth and density and the

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Xie, Shi Hui, Mi Mi Li, Mei Juan Zhou, Min Sun, and Shi Feng Huang. "Study on Acoustic Emission of 1-3 Orthotropic Cement Based Piezoelectric Sensors." Advanced Materials Research 487 (March 2012): 471–75. http://dx.doi.org/10.4028/www.scientific.net/amr.487.471.

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1-3 orthotropic cement based piezoelectric composites were fabricated by cut-filling and arrange-filling technique, using PZT-51 ceramic as functional material and cement as passive matrix. 1-3 orthotropic cement based piezoelectric composites were prepared into Acoustic Emission (AE) sensors, the attenuation of AE signal on the concrete and the response of different sensors on the concrete with increasing distance were researched. The results showed that the signal strength received by sensing element increases with the increasing PZT volume fraction; signal peaks and amplitude decrease gradu

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de, Toledo Moroti Matheus, Marcos Rafael Severgnini, João Pedro Bolovon, Luís Felipe Toledo, and Edelcio Muscat. "Filling the knowledge gaps of Paratelmatobius mantiqueira (Anura: Leptodactylidae): tadpole, acoustic repertoire, and life history traits." Journal of Natural History 56, no. 37-40 (2022): 1563–84. https://doi.org/10.1080/00222933.2022.2119177.

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de Toledo Moroti, Matheus, Severgnini, Marcos Rafael, Bolovon, João Pedro, Toledo, Luís Felipe, Muscat, Edelcio (2022): Filling the knowledge gaps of Paratelmatobius mantiqueira (Anura: Leptodactylidae): tadpole, acoustic repertoire, and life history traits. Journal of Natural History 56 (37-40): 1563-1584, DOI: 10.1080/00222933.2022.2119177, URL: http://dx.doi.org/10.1080/00222933.2022.2119177

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Bulkin, Vladislav, Sergey Sereda, and Marina Kalinichenko. "ASSESSMENT OF THE ACOUSTIC SCREEN ABSORBING PROPERTIES BASED ON THE HELMHOLTZ RESONATOR." Akustika 32 (March 1, 2019): 201–5. http://dx.doi.org/10.36336/akustika201932201.

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The article deals with the problem of reducing noise from highways. The aim of the work is a more detailed study of the acoustic screen potential based on the Helmholtz resonator, in particular, the possibility of using such a screen to reduce the noise level in the area in front of the screen. The main task solved in this article is to determine, by experimental and analytical methods, the amplitude-frequency characteristic of a noise-absorbing screen installed in an acoustic chamber. The results of measurements of the sound pressure level at various frequencies in the area in front of the sc

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Rothe, Sebastian, Christopher Blech, Hagen Watschke, Thomas Vietor, and Sabine C. Langer. "Material Parameter Identification for Acoustic Simulation of Additively Manufactured Structures." Materials 14, no. 1 (2020): 168. http://dx.doi.org/10.3390/ma14010168.

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One possibility in order to manufacture products with very few restrictions in design freedom is additive manufacturing. For advanced acoustic design measures like Acoustic Black Holes (ABH), the layer-wise material deposition allows the continuous alignment of the mechanical impedance by different filling patterns and degrees of filling. In order to explore the full design potential, mechanical models are indispensable. In dependency on process parameters, the resulting homogenized material parameters vary. In previous investigations, especially for ABH structures, a dependency of the materia

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Zhang, Chunlei, Xuelin Song, Yuhua Fu, Daxing Lei, Weijie She, and Wenxiao Zhu. "Acoustic Emission-Based Modeling of Fiber Tailings Cementation and Filling Body Dynamics and Damage Ontology." Minerals 13, no. 12 (2023): 1499. http://dx.doi.org/10.3390/min13121499.

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Optimizing the mechanical characteristics of cemented tailings backfill (CTB) and quickly identifying its damage state under external loading, this study compares and prepares CTB specimens without fiber, doped with polypropylene fiber (PF), doped with glass fiber (BL), and doped with polypropylene and glass blended fiber (PB). Uniaxial compression and acoustic emission (AE) monitoring experiments are also conducted. Based on the cumulative energy of AE, the damage ontology model of CTB was developed. As shown by the study’s findings, adding various fibers can greatly enhance the filler body’s

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Kukhta, V. S., O. S. Kyrmanov, V. F. Makeyev, and O. M. Stankevych. "ESTIMATION OF FRACTURE RESISTANCE OF NANOCOMPOSITE FILLING MATERIALS USING ACOUSTIC EMISSION METHOD." World of Medicine and Biology 18, no. 82 (2022): 112. http://dx.doi.org/10.26724/2079-8334-2022-4-82-112-117.

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Monninger, P., and A. N. Thite. "A sustainable approach of damping treatment for aluminium honeycomb sandwich structures." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, no. 6 (2018): 1403–18. http://dx.doi.org/10.1177/0954407018794596.

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The damping plays a vital role in structural dynamic and acoustic performance of aluminium honeycomb sandwich structures. The viscoelastic damping treatment of skins is most common. An alternative, the use of sustainable cork inserts to improve the damping of cores and the whole assembly is investigated in this study. Structures with different filling degrees are analysed, as well as the optimum location for inserts is determined. The structural dynamic as well as the vibro-acoustic performance is estimated numerically. Average squared displacement amplitude reduction efficiency [Formula: see

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Shu, Zhilin, Yang Liu, Yicheng Ye, Weiqi Wang, Binyu Luo, and Jinpeng Jia. "Influences of roughness and filling degree on the shear strength and damage evolution characteristics of cement-filled joints." PLOS ONE 20, no. 1 (2025): e0314229. https://doi.org/10.1371/journal.pone.0314229.

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The shear resistance of filling joints is an important factor affecting the stability of rock joints. Pressure-shear tests of cement-filled joints were carried out. Combined with the acoustic emission (AE) technique, the effects of normal stress, roughness and filling degree on the shear strength, damage morphology and damage evolution of cement-filled joints were investigated. The results show that with the increase of roughness, the failure mode is more complicated. When the roughness is low, only the bonding surface of the interface between the filler and the joint surface is damaged, and t

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Cuntz, Manfred, Klaus-Peter Schröder, Diaa E. Fawzy, and Andrew R. Ridden-Harper. "Chromospheric activity in 55 Cancri: II. Theoretical wave studies versus observations." Monthly Notices of the Royal Astronomical Society 505, no. 1 (2021): 274–82. http://dx.doi.org/10.1093/mnras/stab1266.

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ABSTRACT In this study, we consider chromospheric heating models for 55 Cancri in conjunction with observations. The theoretical models, previously discussed in Paper I, are self-consistent, non-linear, and time-dependent ab-initio computations encompassing the generation, propagation, and dissipation of waves. Our focus is the consideration of both acoustic waves and longitudinal flux tube waves amounting to two-component chromosphere models. 55 Cancri, a K-type orange dwarf, is a star of low activity, as expected by its age, which also implies a relatively small magnetic filling factor. The

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Shao, Xiaoping, Chuang Tian, Chao Li, et al. "The Experimental Investigation on Mechanics and Damage Characteristics of the Aeolian Sand Paste-like Backfill Materials Based on Acoustic Emission." Materials 15, no. 20 (2022): 7235. http://dx.doi.org/10.3390/ma15207235.

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With the wide application of the filling mining method, it is necessary to consider the influence of rock activity on the filling body, reflected in the laboratory, that is, the influence of loading rate. Therefore, to explore the response characteristics of loading rate on the mechanical and damage characteristics of aeolian sand paste filling body, DNS100 electronic universal testing machine and DS5-16B acoustic emission (AE) monitoring system were used to monitor the stress–strain changes and AE characteristic parameters changes of aeolian sand paste filling body during uniaxial compression

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Cutanda Henriquez, Vicente, and José Sánchez-Dehesa. "Controlling the amount of acoustic absorption by using clusters of hard cylinders." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 2 (2021): 4608–14. http://dx.doi.org/10.3397/in-2021-2759.

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The viscothermal absorption of a cluster of hard cylinders periodically arranged in air is directly related with the filling fraction of the underlying lattice. In this work, we present a comprehensive study of the viscous absorption of clusters with circular external shape. The study has been performed by using a homogenization theory in which the clusters have been represented by a single fluid-like cylinder with effective parameters. The validity of the homogenization approach has been supported with numerical experiments in which the viscosity of the actual cluster is calculated with an im

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Li, Fang-Fang, Chen Huang, Xie En, Guang-Qiang Wang, and Jun Qiu. "Microscopic experimental study on acoustic agglomeration of the droplets on wall." Thermal Science, no. 00 (2020): 233. http://dx.doi.org/10.2298/tsci200309233l.

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Study on the effect of acoustic wave on droplet collision-coalescence process is interesting and helps to better understand acoustic agglomeration mechanism. This study designs and carries out a microscopic experiment to investigate the effect of acoustic wave on wall droplet collision-coalescence process. The derived microscopic images of droplets under the action of different sound waves at different moment are processed and analyzed by binaryzation with iterative threshold, cavity filling, morphological open arithmetic processing, and identification of connected regions, etc. Using a newly

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Xu, Weiping, Bangrang Di, Haifeng Chen, and Jianxin Wei. "Experimental Analysis of Elastic Property Variations in Methane Hydrate-Bearing Sediments with Different Porosities." Journal of Marine Science and Engineering 12, no. 12 (2024): 2370. https://doi.org/10.3390/jmse12122370.

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Natural gas hydrates, a promising clean energy resource, hold substantial potential. Porosity plays a crucial role in hydrate systems by influencing formation processes and physical properties. To clarify the effects of porosity on hydrate elasticity, we examined methane hydrate formation and its acoustic characteristics. Experiments were conducted on sediment samples with porosities of 23%, 32%, and 37%. P- and S-wave velocities were measured to assess acoustic responses. Results show that as hydrate saturation increases, sample acoustic velocity also rises. However, high-porosity samples con

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Cuntz, Manfred, and Diaa E. Fawzy. "Evolution of Solar-type Activity: A Brief Study of Ca ii Emission in Beta Hydri (G2 IV)." Research Notes of the AAS 6, no. 7 (2022): 147. http://dx.doi.org/10.3847/2515-5172/ac81d1.

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Abstract We present results about the decrease of stellar activity for stars like the Sun evolving toward the subgiant stage. Specifically, we examine two-component chromosphere models (acoustic and magnetic) for β Hydri (G2 IV) based on detailed time-dependent simulations while focusing on Ca ii emission. We convey models for two different photospheric magnetic filling factors.

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Thomson, Dugald, Jessica Topple, and David R. Barclay. "An acoustic dataset augmentation generator for ship noise classification." Journal of the Acoustical Society of America 156, no. 4_Supplement (2024): A56. https://doi.org/10.1121/10.0035097.

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Automated target recognition using ship noise has advanced rapidly with machine learning, yet remains constrained by a limited number of benchmark datasets due to a scarcity of labeled data. This study aims to enhance ship classifier performance by addressing dataset limitations through an innovative Acoustic Dataset Augmentation Generator. Leveraging acoustic data from Arctic hydrophones and incorporating simulated ship noise via a Passive Sonar Simulator alongside ambient noise variations, this generator simulates diverse environmental conditions to enrich training datasets. By filling gaps

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Zhao, Wengao, Qingtao Bu, Zihao Wang, et al. "A Comparative Study on Acoustic Characteristics of Methane and Tetrahydrofuran Hydrate-Bearing Sediments." Journal of Marine Science and Engineering 12, no. 12 (2024): 2239. https://doi.org/10.3390/jmse12122239.

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Laboratory acoustic measurements of hydrate-bearing sediments serve as an important reference for the geological interpretation of seismic exploration data. Tetrahydrofuran (THF) hydrates are relatively easy to form with precise control of hydrate saturation, and they overcome the long time it takes for methane in sediments to form hydrate. However, when THF hydrates are used as a substitute for methane hydrate, their acoustic properties yield different results. This study reports the results of a series of laboratory experiments on the formation of methane and THF hydrate in quartz sand and t

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Willett, R. L., M. A. Paalanen, L. N. Pfeiffer, K. W. West, and R. R. Ruel. "High Frequency Conductivity in the Fractional Quantum Hall Regime." International Journal of Modern Physics B 06, no. 05n06 (1992): 791–801. http://dx.doi.org/10.1142/s0217979292000487.

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Surface acoustic wave (SAW) propagation on high quality AlGaAs/GaAs heterostructures is examined in the fractional quantum Hall regime By measuring the transmitted SAW amplitude and frequency the 2D electron system (2DES) conductivity at the SAW frequency can be deduced and compared to the measured d.c. conductivity. Up to about 500MHz the SAW derived conductivity does not differ substantially from the measured d.c. conductivity. At higher frequencies some deviations are observed at FQHE and IQHE states However, at Landau level filling ν=1/2 SAW propagation is markedly different from that obse

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Guo, Li Li, Mi Mi Li, Min Sun, Dong Yu Xu, and Shi Feng Huang. "Fabrication and Properties of 1-3 Polymer Modified Cement Based Piezoelectric Composites." Advanced Materials Research 306-307 (August 2011): 305–8. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.305.

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A piezoelectric ceramic(lead niobium lithium zirconate titanate, P(LN)ZT), sulphoaluminate cement and polymer were used to fabricate polymer modified cement based piezoelectric composites by cut-filling technique. The influence of P(LN)ZT volume fraction on the electromechanical properties and acoustic impedance of composite was investigated. Comparing with P(LN)ZT Piezoelectric ceramic, the vibration at thickness mode of 1-3 type piezoelectric composite is strengthened, and the electromechanical quality factor is reduced. When P(LN)ZT volume fraction is 30.86%, the acoustic impedance value is

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