Articles de revues : « Acoustic tile »

1

Schuelke, David J., Randy H. Barnard et Kenneth E. Kleinke. « Acoustic tile ». Journal of the Acoustical Society of America 87, n^o 1 (janvier 1990) : 466. http://dx.doi.org/10.1121/1.399255.

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Boerckel, David A., et Lawrence H. Boerckel. « Acoustic tile cutting assembly ». Journal of the Acoustical Society of America 84, n^o 4 (octobre 1988) : 1579. http://dx.doi.org/10.1121/1.397199.

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Grygorowicz-Kosakowska, Klaudia, et Anna Sygulska. « The Acoustic Ceramic Module ». Leonardo 53, n^o 3 (mai 2020) : 268–73. http://dx.doi.org/10.1162/leon_a_01742.

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This paper discusses issues common to architecture, sculpture and acoustics and presents the authors' design of an acoustic ceramic module, currently in the prototype stage. The project was conceived to create a system of ceramic tiles that can create a space as well as enhance the acoustics of its interior. Modularity ensures that through numerous combinations many patterns can be produced from one tile design. The ceramic materials used may vary, from porous chamotte to the smooth surfaces of casting slips to glazing. The key issue, apart from shaping an interior architecture, was to focus on the acoustic function of the tiles. The creative process was of a two-fold nature: Its visual aspect focused on individualization of the space, while its functional one was to ensure acoustically comfortable interiors.

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Corsaro, Robert. « Thin, lightweight acoustic actuator tile ». Journal of the Acoustical Society of America 117, n^o 3 (2005) : 990. http://dx.doi.org/10.1121/1.1896647.

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Topolář, Libor, Dalibor Kocáb, Jiří Šlanhof, Pavel Schmid, Petr Daněk et Jaroslav Nováček. « Testing the Influence of the Material Bonding System on the Bond Strength of Large-Format Tiles Installed on Concrete Substrate under Mechanical Loading ». Materials 13, n^o 14 (17 juillet 2020) : 3200. http://dx.doi.org/10.3390/ma13143200.

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The paper describes an experiment focusing on the way the material system influences the bond strength of large-format tiles installed on concrete substrate during mechanical loading under conditions that correspond to real-life application. This involves a controllable mechanical load applied over an area of a test model while observing its condition using non-destructive methods (ultrasonic pulse velocity test, acoustic emission method, strain measurement, and acoustic tracing). The model consisted of a concrete slab onto which were mounted four different systems with large-format tiles with the dimensions of 3 m × 1 m. The combinations differed in the thickness of the tile, the adhesive, and whether or not a fabric membrane was included in the adhesive bed. The experiment showed that the loading caused no damage to the ceramic tile. All the detected failures took place in the adhesive layer or in the concrete slab.

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Mueller, S. A., et F. A. Moslehy. « An Inverse Vibration Method Applied to Bond Evaluation of Space Shuttle Tiles ». Journal of Vibration and Acoustics 118, n^o 3 (1 juillet 1996) : 454–62. http://dx.doi.org/10.1115/1.2888205.

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This paper describes an inverse vibration method for determining unknown parameters of the physical system by using partial modal information. The method is based on knowing the complete mass matrix of the system and part of its stiffness matrix. The unknown parameters in the stiffness matrix are related to the physical system. This method is applied to the bond evaluation of the space shuttle tiles. The tiles are excited by audible acoustic energy and the response is measured by a noncontact laser vibrometer. The inverse solution is incorporated into a user-friendly computer program to determine the size and location of disbonded regions in the tile assembly. The program allows for any tile geometry as well as the orthotropic properties of the the material. Both simulated data, provided by finite element analysis, and experimentally acquired data are used to verify the proposed method.

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Kilcullen, Patrick, Mark Shegelski, MengXing Na, David Purschke, Frank Hegmann et Matthew Reid. « Terahertz Spectroscopy and Brewster Angle Reflection Imaging of Acoustic Tiles ». Journal of Spectroscopy 2017 (2017) : 1–6. http://dx.doi.org/10.1155/2017/2134868.

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A Brewster angle reflection imaging apparatus is demonstrated which is capable of detecting hidden water-filled voids in a rubber tile sample. This imaging application simulates a real-world hull inspection problem for Royal Canadian Navy Victoria-class submarines. The tile samples represent a challenging imaging application due to their large refractive index and absorption coefficient. With a rubber transmission window at approximately 80 GHz, terahertz (THz) sensing methods have shown promise for probing these structures in the laboratory. Operating at Brewster’s angle allows for the typically strong front surface reflection to be minimized while also conveniently making the method insensitive to air-filled voids. Using a broadband THz time-domain waveform imaging system (THz-TDS), we demonstrate satisfactory imaging and detection of water-filled voids without complicated signal processing. Optical properties of the tile samples at low THz frequencies are also reported.

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Xie, Luofeng, Ming Yin, Qinyuan Huang, Yue Zhao, Zhenbo Deng, Zhaowei Xiang et Guofu Yin. « Internal defect inspection in magnetic tile by using acoustic resonance technology ». Journal of Sound and Vibration 383 (novembre 2016) : 108–23. http://dx.doi.org/10.1016/j.jsv.2016.07.020.

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Mueller, Donald S. « LOW DENSITY NON-WOVEN MATERIAL USEFUL WITH ACOUSTIC CEILING TILE PRODUCTS ». Journal of the Acoustical Society of America 131, n^o 5 (2012) : 4226. http://dx.doi.org/10.1121/1.4712251.

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Yao, W., Z. Li et M. Qi. « Damage process detection of a ceramic tile system by acoustic emission ». Experimental Mechanics 40, n^o 3 (septembre 2000) : 265–70. http://dx.doi.org/10.1007/bf02327499.

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Rossi, Gabriella, James Walker, Asbjørn Søndergaard, Isak Worre Foged, Anke Pasold et Jacob Hilmer. « Oscillating wire cutting and robotic assembly of bespoke acoustic tile systems ». Construction Robotics 5, n^o 1 (22 janvier 2021) : 63–72. http://dx.doi.org/10.1007/s41693-020-00051-8.

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Luk, B. L., K. P. Liu et F. Tong. « Rapid evaluation of tile-wall bonding integrity using multiple-head impact acoustic method ». NDT & ; E International 44, n^o 3 (mai 2011) : 297–304. http://dx.doi.org/10.1016/j.ndteint.2011.01.004.

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Chun, Wonjong, Eunghwy Noh, Won-Suk Ohm et Youngsoo Seo. « Acoustic radiation characteristics of a tile projector with performance variations among unit transducers ». Journal of the Acoustical Society of Korea 35, n^o 6 (30 novembre 2016) : 436–44. http://dx.doi.org/10.7776/ask.2016.35.6.436.

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Zhang, Yan Bing, Chun Yu Ren et Xi Zhu. « Research on Vibration and Sound Radiation from Submarine Functionally Graded Material Nonpressure Cylindrical Shell ». Advanced Materials Research 690-693 (mai 2013) : 3046–49. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.3046.

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In this paper, we establish the finite element (FEM) and boundary element (BEM) models of a submarine section, and study the underwater sound radiation field of three different non-pressure shells made of steel, steel with anechoic tile, and the functionally graded materials (FGM) separately using a method combining of FEM and BEM . Research shows that the combination of FEM and BEM can address the acoustic radiation calculation problem of FGM, and in comparison with steel and anechoic tile laying submarine section, the weight of FGM non-pressure shell reduces 1600kg, and the sound radiation power decreases 4db and 2.5db respectively, thus having better performance in vibration and noise reduction.

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Ellingson, William A., J. Scott Steckenrider et Thomas J. Meitzler. « Defect Detection in Ceramic Armor Using Phased Array Ultrasound ». Advances in Science and Technology 65 (octobre 2010) : 143–52. http://dx.doi.org/10.4028/www.scientific.net/ast.65.143.

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Monolithic ceramic tile is used as part of ceramic-composite armor. Rejection of individual tile that contain potential threat-defeat-reducing ―defects‖ must be accomplished in a fast and cost-effective manner. Water-immersion phased-array ultrasound using 10 MHz 128-element transducers sequenced at 32-elements has been demonstrated to quickly scan and detect 25-50 um known inclusion-type defects in individual 25 mm thick SiC tile. Further, use of similar phasedarray transducers and similar transducer-element activation sequences, has shown detection of intentional internal defects in tests of 40 cm square by 50 mm thick, multi-layered composite ceramic-armor specimens. Large changes in acoustic velocities of the various layered materials causes focusing issues of the ultrasonic wave. The use of various digital signal processing methods can be used to overcome some of these issues. The results show that use of phased array ultrasound can reliably be used for defect detection in either monolithic or composite ceramic-armor. The technology and various results are presented.

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Bellahcene, T., J. Capelle, Méziane Aberkane et Z. Azari. « Effect of Hydrogen on Mechanical Properties of Pipeline API 5L X70 Steel ». Applied Mechanics and Materials 146 (décembre 2011) : 213–25. http://dx.doi.org/10.4028/www.scientific.net/amm.146.213.

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The aim of this work is to study the effects of hydrogen absorption on mechanical properties of pipe API 5L X70 steel. This study is conducted in special soil solution NS4 with pH 6.7 It show that the tensile properties like yield stress, ultimate strength and elongation at failure reduced under hydrogen embrittlement. Several fatigue tests (three (03) points bending tests) on roman tile specimens with notch are performed. Fatigue initiation is detected by acoustic emission. A comparison between specimens electrolytically charged with hydrogen and specimens without hydrogen absorption is made and it has been noted that fatigue initiation time is reduced when hydrogen embrittlement occurs. The field of elastoplastic stresses near the notch is computed by the finite-element method with the Abaqus software package. Effective distance and stress are calculated with the volumetric approach and the Notch intensity Factor of the roman tile specimen is determined for each loading value used in our tests.

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Lombardo, S., JJ Orr, DA Coley et MJ Wood. « A new route to exposed thermal mass : Sound-absorbing poured concrete ». Building Services Engineering Research and Technology 38, n^o 4 (9 mars 2017) : 408–20. http://dx.doi.org/10.1177/0143624417698833.

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This paper investigates the novel possibility of utilising the structural concrete floor slab as a means of providing additional mid- to low-frequency sound absorption through the addition of cavities on the ceiling side, formed using flexible formwork, acting as Helmholtz resonators. Mid- to low-frequency sound absorption in rooms is typically achieved through the use of perforated plasterboard or a suspended tile-in-grid system. Such an approach can separate the room from the thermal mass of the ceiling above, leading to higher peak temperatures or increased cooling load. Suspended ceilings can also increase the embodied energy of the building and limit the potential for stack effect ventilation by reducing room height. In this work, frequency-dependent absorption coefficients of perforated concrete samples were measured using an impedance tube test. The results were found to agree with a theoretical analysis, suggesting that it would be relatively easy to predict the performance of perforations of other depths and diameters including those targeted at absorbing higher frequencies. Practical application: The measurements indicate that such a slab could be used as a practical replacement for perforated plasterboard or a tile-in-grid system. This would allow the slab to be tuned to the building’s acoustic performance and structural requirements. The approach has the potential to: (1) reduce the embodied and operational energy of buildings; (2) improve thermal comfort and (3) create a better acoustic environment in situations where surface robustness or longevity is important, for example public stairwells, pathways under roads and metro stations.

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Font, D., F. Naaim-Bouvet et M. Roussel. « Drifting-snow acoustic detector : experimental tests in La Molina, Spanish Pyrenees ». Annals of Glaciology 26 (1998) : 221–24. http://dx.doi.org/10.3189/1998aog26-1-221-224.

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A new gauge to detect drifting snow has been tested at an experimental site at La Molina, eastern Spanish Pyrenees during the 1996 winter.Based on an acoustic principle, it consiste of a miniature microphone located at the base of an aluminium pole of a Variable length (depending on the average height of the snow accumulated in a season). While snowdrifting occurs and the pole is exposed to the flux (wind + snow particles), the snow grains impact on the pole and the sound produced by these collisions is recorded as an electrical signal.30 m away from the snowdrifting detector, there is an anemometric station. The comparison of both records allows determination of thresholds and deposit wind velocities. In addition, this gauge allows users to know, during a wind episode, the exact amount of time during which snowdrifting occurs without being in the field. The interpretation of the values obtained using the acoustic detector is not yet an easy subject to discuss. We slill do not know what the drift-density equivalents for tile recorded noise levels are. However, these are only preliminary results and we expect to complete the calibration of the gauge during the coming months.

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Font, D., F. Naaim-Bouvet et M. Roussel. « Drifting-snow acoustic detector : experimental tests in La Molina, Spanish Pyrenees ». Annals of Glaciology 26 (1998) : 221–24. http://dx.doi.org/10.1017/s0260305500014853.

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A new gauge to detect drifting snow has been tested at an experimental site at La Molina, eastern Spanish Pyrenees during the 1996 winter. Based on an acoustic principle, it consiste of a miniature microphone located at the base of an aluminium pole of a Variable length (depending on the average height of the snow accumulated in a season). While snowdrifting occurs and the pole is exposed to the flux (wind + snow particles), the snow grains impact on the pole and the sound produced by these collisions is recorded as an electrical signal. 30 m away from the snowdrifting detector, there is an anemometric station. The comparison of both records allows determination of thresholds and deposit wind velocities. In addition, this gauge allows users to know, during a wind episode, the exact amount of time during which snowdrifting occurs without being in the field. The interpretation of the values obtained using the acoustic detector is not yet an easy subject to discuss. We slill do not know what the drift-density equivalents for tile recorded noise levels are. However, these are only preliminary results and we expect to complete the calibration of the gauge during the coming months.

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Wing, Elspeth, Steven Herr, Alexander Petty, Alexander Dufour, Frederick Hoham, Morgan Merrill, Donovan Samphier et al. « Case study : Purdue University's "Clapping Circle" : An acoustical investigation ». Noise Control Engineering Journal 69, n^o 4 (1 juillet 2021) : 288–300. http://dx.doi.org/10.3397/1/376928.

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The perplexing acoustical properties of a landscape architecture feature of Academy Park on the Purdue University campus have long been the subject of speculation. The feature, known informally as the "Clapping Circle", consists of sixty-six concentric rings of stone tiles. When someone claps while at the middle of the circle, they hear a high-pitched squeak immediately afterwards. Experiments were conducted by the Purdue student chapter of the Acoustical Society of America to characterize this effect. The response to a clap played from an omnidirectional speaker placed at the center of the circle was recorded using a microphone positioned above the loudspeaker. Spectrograms of the recorded responses revealed the squeak to consist of a descending tone and its harmonics. This tone disappeared from the spectrogram when the tiles were covered with absorbing blankets. A model based on scattering from the bevels between the tile rings reproduced the descending frequency of the squeak. Similarly to famous stepped structures with notable acoustics, the tiles were found to scatter sound best when the wavelength was not larger than the tiles' spatial period. Thus, it was concluded that the squeak is an example of an acoustical diffraction grating which creates a repetition pitch caused by scattering from the tile formation.

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Mondragon, Rosa, Juan Carlos Jarque, J. Enrique Julia, Leonor Hernandez et Antonio Barba. « Effect of slurry properties and operational conditions on the structure and properties of porcelain tile granules dried in an acoustic levitator ». Journal of the European Ceramic Society 32, n^o 1 (janvier 2012) : 59–70. http://dx.doi.org/10.1016/j.jeurceramsoc.2011.07.025.

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Zahraee, Seyed Mojib, Milad Hatami, Ali Asghar Bavafa, Kambiz Ghafourian et Jafri Mohd Rohani. « Application of Statistical Taguchi Method to Optimize Main Elements in the Residential Buildings in Malaysia Based Energy Consumption ». Applied Mechanics and Materials 606 (août 2014) : 265–69. http://dx.doi.org/10.4028/www.scientific.net/amm.606.265.

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Today energy consumption is one of the controversial issues in the world. The rapid growing world energy consumption has already increased concern about the supply problems, heavy environmental effects such as global warming, climate change and etc. One of the most users of energy is residential buildings that consume the biggest share of energy. Growth in population, rising demand for buildings together causes to increase the upward trend in energy consumption. Therefore, energy efficiency in buildings plays a significant role to decrease the environmental effect. The goal of this paper is optimizing the main elements which are window, ceiling and wall by considering the effect of uncontrollable factors such as humidity , temperature and pressure in residential buildings using statistical method namely Taguchi method (JMP 11 software). A two-storey house in Malaysia was selected to simulate by means of BIM application. Based on the result, the optimum energy saving will be achieved when the type of material which are used for wall ,ceiling and window to be Brick Plaster , Acoustic Tile Suspended and Single Glazed Alum Frame respectively.

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Komarov, K. « Particular qualities of buildings' transit spaces finishing with respect to the needs of the Blind visitors ». Research and methodological works of the National Academy of Visual Arts and Architecture, n^o 27 (27 février 2019) : 11–16. http://dx.doi.org/10.33838/naoma.27.2018.11-16.

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The article defines a list of properties of finishing materials, contrast of which creates the potential for improving the effectiveness of visually impaired visitors’ orientation in buildings’ transit spaces. The expediency of accentuating important elements with materials contrasting in texture, thermal conductivity, degree of sound absorption, size, shape of the module and aroma in relation to the main surfaces is established. The contrast of the surface finish of basic planes and their fragments can be used rationally to form tactile symbols, to accentuate important functional zones, and to warn of approaching a dangerous element. Materials contrasting by the thermal conductivity relatively to the main covering plane can be applied in the finishing of the guide planes to accentuate them at the level of thermal sensations. The use of natural wooden railing against the background of glass and metal enclosure could serve an example of such a solution. The use of facing materials, contrasting in terms of sound absorption, the magnitude and geometric form of modules, provides variations in the frequency, height and tone quality of the sound created by visitor's steps and cane. Such a feature can be used to simplify the non-visual identification of key fragments of transit space. Physical properties of facing materials influence the time of reverberation of sound in the premises, which is primarily determined by the size and geometric form of the interior space. This determines the importance of the right choice of finishing materials, taking into account their acoustic properties. The decrease in reverberation, which is associated with a decrease in the size of the room, is achieved with ridget or jagged covering panels, which have a high degree of absorption, and the increase, on the contrary – with flat glossy tiles. In practice of construction of specialized buildings for the Blind the flooring materials are advised to be selected in such a way as to create simultaneous tactile and acoustic contrast. Foer example a combination of a wooden floor with a ceramic tile is contrasting on the surface finish, height and tone quality of the created sound. It has been established that the scent of finishing materials is rarely used by architects as a mean of marking element in the space, while facing materials determine the presence of a special odor in the room and it’s concentration. Consideration of this feature in design of transit spaces creates additional potential for improving the orientation of the visually impaired persons.

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Gautam, Prashanta, et Abhilash J. Chandy. « A Computational Fluid Dynamics Model for Investigating Air-Pumping Mechanisms in Air-Borne Tire Noise ». Tire Science and Technology 44, n^o 3 (1 juillet 2016) : 191–211. http://dx.doi.org/10.2346/tire.16.440304.

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ABSTRACT The reduction in power train noise over the past decade has led to an increased focus in reducing tire/road noise, largely due to the environmental concerns related to road traffic noise in industrial countries. Computational fluid dynamic (CFD) simulations conducted using ANSYS FLUENT are presented here with the objective of understanding air-pumping noise-generation mechanisms due to tire/road interaction. The CFD model employs a large eddy simulation turbulence modeling approach, in which the filtered compressible Navier-Stokes equations are solved to obtain temporally and spatially accurate near-field pressure fluctuations for a two-dimensional (2D) tire geometry with (1) one groove and (2) two grooves. In addition, the Ffowcs-Williams and Hawkings (FW-H) acoustic model is used to predict far-field acoustics. The deformation of the grooves, as the tire rotates, is represented by prescribed sidewall movements. Consequently, the solution to the numerical problem is obtained through a single process, thereby enabling the prediction of small-scale air pumping, horn effect, and far-field acoustics in a single simulation. The acoustic characteristics associated with air pumping are studied through spectral analysis tools, and comparisons show that the additional groove on the horn geometry alters the spectral characteristics of air pumping. Validation of the model is conducted through qualitative and quantitative comparisons with previous studies. These simulations are intended to provide a deeper understanding about the small-scale noise generation as well as the near-field and far-field acoustics, thereby paving the way for the automotive manufacturer to compare a variety of air-related tire noise characteristics without spending time and money for vehicle pass-by tests.

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Barth, Manuela, Armin Raabe, Klaus Arnold, Christian Resagk et Ronald du Puits. « Flow field detection using acoustic travel time tomography ». Meteorologische Zeitschrift 16, n^o 4 (30 août 2007) : 443–50. http://dx.doi.org/10.1127/0941-2948/2007/0216.

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Rastogi, Vipin K., Shawn P. Ryan, Lalena Wallace, Lisa S. Smith, Saumil S. Shah et G. Blair Martin. « Systematic Evaluation of the Efficacy of Chlorine Dioxide in Decontamination of Building Interior Surfaces Contaminated with Anthrax Spores ». Applied and Environmental Microbiology 76, n^o 10 (19 mars 2010) : 3343–51. http://dx.doi.org/10.1128/aem.02668-09.

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ABSTRACT Efficacy of chlorine dioxide (CD) gas generated by two distinct generation systems, Sabre (wet system with gas generated in water) and ClorDiSys (dry system with gas generated in air), was evaluated for inactivation of Bacillus anthracis spores on six building interior surfaces. The six building materials included carpet, acoustic ceiling tile, unpainted cinder block, painted I-beam steel, painted wallboard, and unpainted pinewood. There was no statistically significant difference in the data due to the CD generation technology at a 95% confidence level. Note that a common method of CD gas measurement was used for both wet and dry CD generation types. Doses generated by combinations of different concentrations of CD gas (500, 1,000, 1,500, or 3,000 parts per million of volume [ppmv]) and exposure times (ranging between 0.5 and 12 h) were used to evaluate the relative role of fumigant exposure period and total dose in the decontamination of building surfaces. The results showed that the time required to achieve at least a 6-log reduction in viable spores is clearly a function of the material type on which the spores are inoculated. The wood and cinder block coupons required a longer exposure time to achieve a 6-log reduction. The only material showing a clear statistical difference in rate of decay of viable spores as a function of concentration was cinder block. For all other materials, the profile of spore kill (i.e., change in number of viable spores with exposure time) was not dependent upon fumigant concentration (500 to 3,000 ppmv). The CD dose required for complete spore kill on biological indicators (typically, 1E6 spores of B acillus atrophaeus on stainless steel) was significantly less than that required for decontamination of most of the building materials tested.

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Baig, Mirza A. « Mineral wool‐free acoustical tile composition ». Journal of the Acoustical Society of America 98, n^o 4 (octobre 1995) : 1835. http://dx.doi.org/10.1121/1.413355.

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Ishii, Yasuo. « Method for forming embossed acoustical tile ». Journal of the Acoustical Society of America 77, n^o 2 (février 1985) : 781. http://dx.doi.org/10.1121/1.392297.

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Shirahatti, U. S., et M. L. Munjal. « Acoustic Characterization of Porous Ceramic Tiles ». Noise Control Engineering Journal 28, n^o 1 (1987) : 26. http://dx.doi.org/10.3397/1.2827678.

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Nara, E. O. B., J. A. R. Moraes, A. M. V. de Freitas, G. Rediske et G. B. Benitez. « Addition of alternative materials to ceramic slabs ». Cerâmica 60, n^o 355 (septembre 2014) : 340–47. http://dx.doi.org/10.1590/s0366-69132014000300005.

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The construction market is very growing, leading to the emergence of new technologies and materials, and a growing need for sustainable products for the construction process, and the call for quality of life we present the description of a new option alternative materials for environments that require careful with the acoustics. The research covers the development and incorporation of new material in construction, with the potential acoustic, from tests and measurements with calibrated decibel meter called. We also used the ceramic tiles pre-molded, used for making floors or ceilings in buildings and homes. The methodology used for the development of this research was characterized as literature, exploratory, descriptive, qualitative and quantitative, alternative and affordable. How after the analysis results of the tests performed it can be seen that the incorporation of rice hulls of agglomerated to form ceramic tiles, possible reductions in noise levels on the order of 8 dB (A) than the traditional construction of the buildings, and then an excellent material. This research contributes to the construction so that presented a description of a new product developed from a conventional material, originating in agriculture, waste rice husk and its incorporation during the construction of buildings and home, with the potential acoustic observed from tests and measurements with calibrated decibel meter called.

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Ahmad, Mansoor, Ayhan Bozkurt et Omid Farhanieh. « Evaluation of acoustic-based particle separation methods ». World Journal of Engineering 16, n^o 6 (2 décembre 2019) : 823–38. http://dx.doi.org/10.1108/wje-06-2019-0167.

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Purpose This paper aims to Separation and sorting of biological cells is desirable in many applications for analyzing cell properties, such as disease diagnostics, drugs delivery, chemical processing and therapeutics. Design/methodology/approach Acoustic energy-based bioparticle separation is a simple, viable, bio-compatible and contact-less technique using, which can separate the bioparticles based on their density and size, with-out labeling the sample particles. Findings Conventionally available bioparticle separation techniques as fluorescence and immunomagnetic may cause a serious threat to the life of the cells due to various compatibility issues. Moreover, they also require an extra pre-processing labeling step. Contrarily, label-free separation can be considered as an alternative solution to the traditional bio-particle separation methods, due to their simpler operating principles and lower cost constraints. Acoustic based particle separation methods have captured a lot of attention among the other reported label-free particle separation techniques because of the numerous advantages it offers. Practical implications This study tries to briefly cover the developments of different acoustic-based particle separation techniques over the years. Unlike the conventional surveys on general bioparticles separation, this study is focused particularly on the acoustic-based particle separation. The study would provide a comprehensive guide for the future researchers especially working in the field of the acoustics, in studying and designing the acoustic-based particle separation techniques. Originality/value The study insights a brief theory of different types of acoustic waves and their interaction with the bioparticles is considered, followed by acoustic-based particle separation devices reported till the date. The integration of acoustic-based separation techniques with other methods and with each other is also discussed. Finally, all major aspects like the approach, and productivity, etc., of the adopted acoustic particle separation methods are sketched in this article.

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Barth, Manuela, Gabi Fischer, Armin Raabe, Astrid Ziemann et Frank Weiße. « Remote sensing of temperature and wind using acoustic travel-time measurements ». Meteorologische Zeitschrift 22, n^o 2 (1 avril 2013) : 103–9. http://dx.doi.org/10.1127/0941-2948/2013/0385.

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Paul, Harold J. « Ceiling tile section support ». Journal of the Acoustical Society of America 87, n^o 4 (avril 1990) : 1829. http://dx.doi.org/10.1121/1.399397.

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Mortimer, Francis J. « Suspended ceiling tile system ». Journal of the Acoustical Society of America 82, n^o 5 (novembre 1987) : 1862. http://dx.doi.org/10.1121/1.395767.

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Ostashev, Vladimir E., Sergey N. Vecherin, Keith D. Wilson, Astrid Ziemann et George H. Goedecke. « Recent progress in acoustic travel-time tomography of the atmospheric surface layer ». Meteorologische Zeitschrift 18, n^o 2 (13 mai 2009) : 125–33. http://dx.doi.org/10.1127/0941-2948/2009/0364.

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Qian, De Jin, Xue Ren Wang et Xu Hong Miao. « Research on the Insulation Performance of Sound-Isolating and Decoupled Tiles ». Applied Mechanics and Materials 457-458 (octobre 2013) : 703–6. http://dx.doi.org/10.4028/www.scientific.net/amm.457-458.703.

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The acoustic performance of sound-isolating and decoupled tiles is studied from macroscopic and microscopic. First, the sound absorption and reverse sound insulation performance of sound-isolating and decoupled tiles is studied based on laminated media; then the acoustic decoupling materials influence on acoustic radiation of double cylindrical shell underwater is studied, using a double-layer cylindrical structure of large-scale as experimental model .There are large amount of operating modes designed in this experiment, such as all laying, partial laying, laying and so on. The results show that sound-isolating and decoupled tiles not only have the effect of weakening the absorption of reflections, but also have reverse sound insulation effect, which increases as frequency increases; for single point mechanical vibration, the tiles can effectively inhibit vibration and sound radiation of high frequency in the double shell.

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Luk, B. L., K. P. Liu, Z. D. Jiang et F. Tong. « Robotic impact-acoustics system for tile-wall bonding integrity inspection ». Mechatronics 19, n^o 8 (décembre 2009) : 1251–60. http://dx.doi.org/10.1016/j.mechatronics.2009.07.006.

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Xie, Luofeng, Qinyuan Huang, Yue Zhao et Guofu Yin. « Inspection of magnetic tile internal cracks based on impact acoustics ». Nondestructive Testing and Evaluation 30, n^o 2 (25 mars 2015) : 147–64. http://dx.doi.org/10.1080/10589759.2015.1018255.

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Park, Joseph, Robert Heitsenrether et William Sweet. « Water Level and Wave Height Estimates at NOAA Tide Stations from Acoustic and Microwave Sensors ». Journal of Atmospheric and Oceanic Technology 31, n^o 10 (1 octobre 2014) : 2294–308. http://dx.doi.org/10.1175/jtech-d-14-00021.1.

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Abstract The National Oceanic and Atmospheric Administration (NOAA) is transitioning the primary water level sensor at the majority of tide stations in the National Water Level Observation Network (NWLON) from an acoustic ranging system to a microwave radar system. Field comparison of the acoustic and microwave systems finds statistically equivalent performance when temperature gradients between the acoustic sensor and water surface are small and when significant wave height is less than roughly 0.5 m. When significant wave height is greater than approximately 0.5–1 m, the acoustic system consistently reports lower water levels. An analysis of 2 months of acoustic and microwave water level data at Duck, North Carolina, finds that the majority of differences between the two sensors can be attributed to systemic errors in the acoustic system and that the microwave system captures water level variability with higher fidelity than the acoustic system. NWLON real-time data products include the water level standard deviation, a statistic that can serve as a proxy for significant wave height. This study identifies 29 coastal water level stations that are candidates for monitoring wave height based on water level standard deviation, potentially adding a significant source of data for the sparsely sampled coastal wave fields around the United States, and finds that the microwave sensor is better suited than the acoustic system for wave height estimates.

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Ih, Jeong-Guon. « Regeneration of the Retarded Time Vector for Enhancing the Precision of Acoustic Pyrometry ». Journal Of The Acoustical Society Of Korea 33, n^o 2 (2014) : 118. http://dx.doi.org/10.7776/ask.2014.33.2.118.

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Zhong Zhen, 钟镇, 张旭苹 Zhang Xuping et 邹宁睦 Zou Ningmu. « 相位光时域反射仪中声信号测量范围的提升 ». Acta Optica Sinica 41, n^o 13 (2021) : 1306023. http://dx.doi.org/10.3788/aos202141.1306023.

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Koch, John D., Mark R. Glassley et Richard N. Cunningham. « Method for forming ceiling tile ». Journal of the Acoustical Society of America 92, n^o 1 (juillet 1992) : 627. http://dx.doi.org/10.1121/1.404096.

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Stephan, Yann, Xavier Demoulin, Sergio Jesus, Emanuel Ferreira Coelho et Michael B. Porter. « Internal tide impact measured by acoustic tomography experiment ». Journal of the Acoustical Society of America 100, n^o 4 (octobre 1996) : 2613. http://dx.doi.org/10.1121/1.417663.

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Baig, Mirza A. « ACOUSTIC CEILING TILES MADE WITH PAPER PROCESSING WASTE ». Journal of the Acoustical Society of America 132, n^o 3 (2012) : 1871. http://dx.doi.org/10.1121/1.4752150.

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Eom. « Algorithm and Experimental Verification of Underwater Acoustic Communication Based on Passive Time-Reversal Mirror ». Journal of the Acoustical Society of Korea 33, n^o 6 (2014) : 392. http://dx.doi.org/10.7776/ask.2014.33.6.392.

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Muto, Atsuhiro, Richard B. Alley, Byron R. Parizek et Sridhar Anandakrishnan. « Bed-type variability and till (dis)continuity beneath Thwaites Glacier, West Antarctica ». Annals of Glaciology 60, n^o 80 (10 octobre 2019) : 82–90. http://dx.doi.org/10.1017/aog.2019.32.

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AbstractRecent seismic measurements from upper Thwaites Glacier indicate that the bed-type variability is closely related to the along-flow basal topography. In high-relief subglacial highlands, stoss sides of topographic highs have a relatively higher acoustic impedance (‘hard’ bed) with lower acoustic impedance (‘soft’ till) on lee sides. This pattern is similar to observations of many deglaciated terrains. Subglacial hydraulic-potential gradient and its divergence show a tendency for water to diverge over the stoss sides and converge into the lee sides. Convergence favors a thicker or more widespread water system, which can more efficiently decouple ice from the underlying till. Under such circumstances, till deformation does occur but, fluxes are relatively small. Till carried from the lee sides onto stoss sides of downstream bumps should couple to the ice more efficiently, increasing the ability for transport by till deformation. In turn, this suggests that steady-state till transport can be achieved if the stoss-side till layer is thin or discontinuous. In addition, the large basal shear stress generated in the highlands seems too high for a bed lubricated by a continuous although thin deforming till, suggesting till discontinuity, which would allow debris-laden ice to erode bedrock on stoss sides, supplying additional till for transport.

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Becker, Matthew W., et Thomas I. Coleman. « Distributed Acoustic Sensing of Strain at Earth Tide Frequencies ». Sensors 19, n^o 9 (27 avril 2019) : 1975. http://dx.doi.org/10.3390/s19091975.

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The solid Earth strains in response to the gravitational pull from the Moon, Sun, and other planetary bodies. Measuring the flexure of geologic material in response to these Earth tides provides information about the geomechanical properties of rock and sediment. Such measurements are particularly useful for understanding dilation of faults and fractures in competent rock. A new approach to measuring earth tides using fiber optic distributed acoustic sensing (DAS) is presented here. DAS was originally designed to record acoustic vibration through the measurement of dynamic strain on a fiber optic cable. Here, laboratory experiments demonstrate that oscillating strain can be measured with DAS in the microHertz frequency range, corresponding to half-day (M2) lunar tidal cycles. Although the magnitude of strain measured in the laboratory is larger than what would be expected due to earth tides, a clear signal at half-day period was extracted from the data. With the increased signal-to-noise expected from quiet field applications and improvements to DAS using engineered fiber, earth tides could potentially be measured in deep boreholes with DAS. Because of the distributed nature of the sensor (0.25 m measurement interval over kilometres), fractures could be simultaneously located and evaluated. Such measurements would provide valuable information regarding the placement and stiffness of open fractures in bedrock. Characterization of bedrock fractures is an important goal for multiple subsurface operations such as petroleum extraction, geothermal energy recovery, and geologic carbon sequestration.

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Morgera, S., K. Reuben et C. Cole. « A microprocessor-based acoustic telemetry system for tide measurement ». IEEE Journal of Oceanic Engineering 11, n^o 1 (janvier 1986) : 100–108. http://dx.doi.org/10.1109/joe.1986.1145144.

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Raabe, Armin, Klaus Arnold et Astrid Ziemann. « Near surface spatially averaged air temperature and wind speed determined by acoustic travel time tomography ». Meteorologische Zeitschrift 10, n^o 1 (15 mars 2001) : 61–70. http://dx.doi.org/10.1127/0941-2948/2001/0010-0061.

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Cárdenas Hinojosa, Gustavo, Horacio de la Cueva, Tim Gerrodette et Armando M. Jaramillo-Legorreta. « Distribution of the acoustic occurrence of dolphins during the summers 2011 to 2015 in the Upper Gulf of California, Mexico ». PeerJ 8 (20 mai 2020) : e9121. http://dx.doi.org/10.7717/peerj.9121.

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Baseline knowledge of spatial and temporal distribution patterns is essential for cetacean management and conservation. Such knowledge is particularly important in areas where gillnet fishing occurs, as the Upper Gulf of California, which increases the probability of bycatch of cetaceans. In this area, the vaquita porpoise (Phocoena sinus) has been widely studied, but the knowledge of other cetaceans is scarce and based on traditional visual survey methods. We used data collected by an array of acoustic click detectors (C-PODs) during the summers 2011 to 2015 to analyze the distribution of dolphins in the Vaquita Refuge in the Upper Gulf of California. We recorded 120,038 echolocation click trains of dolphins during 12,371 days of recording effort at 46 sampling sites. Based on simultaneous visual and acoustic data, we estimated a false positive acoustic detection rate of 19.4%. Dolphin acoustic activity varied among sites, with higher activity in the east of the Vaquita Refuge. Acoustic activity was higher at night than during the day. We used negative binomial generalized linear models to study the count of clicks of dolphins in relation to spatial, temporal, physical, biological and anthropogenic explanatory variables. The best model selected for the response variable included sampling site, day-night condition, and vertical component of tide speed. Patterns in the spatial distribution of predicted acoustic activity of dolphins were similar to the acoustic activity observed per sampling season. Higher acoustic activity was predicted at night, but the tide speed variable was not relevant under this condition. Acoustic activity patterns could be related to the availability of prey resources since echolocation click trains are associated with foraging activities of dolphins. This is the first study of the distribution of dolphins in Mexico using medium-term systematic passive acoustic monitoring, and the results can contribute to better management to the natural protected area located in the Upper Gulf of California.

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