Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"vibroacoustic"”.
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Vibroacoustic modeling and control for launch vehilce shrouds
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.
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Vibroacoustic analysis of panels using a wave and finite element method
… and finite element (WFE) method to predict the vibroacoustic characteristics of structures, including wave propagation characteristics, sound transmission loss and sound radiation, of flat infinite and finite panels and infinite cylinders. In this method, a coupled fluid/structure system is …
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Control of Radiated Noise from Fluid-Loaded Stiffened Structures
… black holes (ABHs) is developed to control vibroacoustic responses of fluid-loaded stiffened plates. This has been achieved by incorporating ABHs into stiffeners and by analysing their effects on the propagation of BF waves. An analytical model is used to evaluate the vibroacoustic responses …
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Caracterización del proceso de soldadura por puntos por fricción agitación empleando el análisis de señales vibroacústicas
… through the characterization and study of vibroacoustic waves emitted during the process and the execution of the mechanical trials to the dissimilar union wielded using FSSW are analyzed and discussed. An analysis of the behavior of the envelope of the signal during the process and the …
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Development of Industrial Internet of Things Architecture and Business Strategy for Digital Substation Asset Management
… A potential use-case of on-load tap changer vibroacoustic monitoring sensor anomaly detection using artificial neural network autoencoder is explored as an enabled application of the IIoT technology. The autoencoder was able to discern artificially introduced anomaly in real vibroacoustic …
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Vibro-acoustics of porous materials with periodic inclusions
… and poro-elastic media are widely used for vibroacoustic applications, they suffer from a lack of performances at low frequencies compared to their efficiency at higher ones. This issue is generally overcome by multi-layering; anyway, the efficiency of such systems depends on the allowable …
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The transmission of music into the human uterus and the response to music of the human fetus and neonate
… (FHA) response to a music stimulus (MS) and a vibroacoustic stimulus (VS) was measured in 40 subjects. Gestational age of the fetuses ranged from 32 to 42 weeks. The study included a control period with no acoustic stimulation; a period with the presentation of 5 music stimuli; and a period …
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Smart double panel with decentralised active damping units for the control of sound transmission
… of a smart aircraft double panel for active vibroacoustic control. The control of the double panel vibration is implemented using Multi-Input-Multi-Output (MIMO) decentralised velocity feedback loops. The loops are applied via an array of electrodynamic force actuators and collocated velocity …
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Haplós: Towards Technologies for and Applications of Somaesthetics
… developed proof-of-concept of a neuroadaptive vibroacoustic therapeutic device that uses music and vibrotactile stimuli to induce desired mental states. Finally, this research contributes to cognitive science and embodied philosophy by advancing a neuroscientific understanding of vibrotactile …
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Measurement and Analysis of Sub-Convective Pressure Fluctuations in Turbulent Boundary Layers: A Novel Methodology
… This study lays the groundwork for enhanced vibroacoustic analysis and model refinement through innovative measurement techniques. Overall, these measurements provide a refined insight into the nature of sub-convective pressure fluctuations and will aid in the development of more accurate …
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Near-Field Pressure Distributions to Enhance Sound Transmission into Multi-Layer Materials
<p>The large impedance difference between air and most solids prevents significant energy transfer from incident acoustic waves across the air-material interface. Refraction also plays a role in preventing acoustic transmission, as the wave speed difference between air and solid materials results …