Article
Construction & Building Technology
Oriana Palacio, Wim J. Malfait, Silvain Michel, Michel Barbezat, Zahra Mazrouei-Sebdani
Summary: Vibration reduction and structure-borne sound insulation are important for creating a healthy housing environment. Silica aerogels, with their low resonance frequency and dynamic stiffness, show superior performance compared to recycled rubber for vibration isolation in construction.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Acoustics
Albert Vogel, Joerg Arnold, Conrad Voelker, Oliver Kornadt
Summary: In order to predict structure-borne sound-induced sound pressure levels, it is necessary to accurately describe the sound propagation path through the building structure and characterize the vibration behavior of the structure-borne sound sources. This study aims to extend the applicability of the two-stage method for characterizing structure-borne sound sources and to determine its uncertainties. The suitability of using the structure-borne sound parameters determined with TSM in the prediction of sound pressure levels was tested and the achievable accuracy was assessed.
Article
Acoustics
S. Reinhold, C. Hopkins
Summary: Experimentally validated models of a heavyweight reception plate using FEM were used to assess structure-borne sound power injected by single- and multiple-contact sources. High velocity levels near corners and edges of the plate were observed, leading to underestimation of reception plate power when using velocity measurements in the central zone. A sampling strategy with area-weighting approach was developed to improve accuracy, and additional measurement constraints for multiple-contact sources were identified through FEM simulations.
Review
Construction & Building Technology
Bernard Gibson, Tuan Nguyen, Sina Sinaie, David Heath, Tuan Ngo
Summary: In recent years, there has been a significant expansion of multi-storey timber construction worldwide, highlighting the need for effective methods to attenuate low frequency structure-borne sound. This review discusses the fundamentals and significance of the problem, analyzes the shortcomings of existing technologies, and explores potential solutions based on metamaterials.
BUILDING AND ENVIRONMENT
(2022)
Article
Acoustics
Lizhong Song, Kui Gao, Quanmin Liu, Linya Liu, Qingsong Feng
Summary: This study investigates the structure-borne noise characteristics of U-shaped girder bridges (USGBs) with fully-enclosed sound barriers (FESBs) using the fast multipole boundary element method (FMBEM). The analysis model is validated through a noise field test of a simply-supported concrete USGB. The study examines the noise radiation characteristics of the USGB-FESB system and analyzes the impacts of sound barrier type and bridge type on these characteristics.
Article
Environmental Sciences
Erik Neff, Guha Dharmarajan
Summary: Copper pollution can significantly impact the fitness and disease transmission ability of mosquitoes, as well as transfer contaminants between aquatic and terrestrial ecosystems. Exposure to sublethal levels of copper alters adult female fecundity and vector competence in mosquito larvae, indicating potential implications for public health and environmental dynamics. This study provides valuable insights into the complex interactions between metal exposure, vector-borne disease dynamics, and contaminant transfer in mosquito-parasite systems.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Mengjie Zhu, Yi Li, Wenlong Zhang, Linqiong Wang, Haolan Wang, Lihua Niu, Cizhang Hui, Mengting Lei, Longfei Wang, Huanjun Zhang, Gang Yang
Summary: The ecological heterogeneity created by river bends benefits the diversity of microorganisms, which is vital for pollutant degradation and overall river health. However, there is a lack of quantitative tools to determine the interactions among different trophic levels and species, and research on ecological heterogeneity has been limited to a few species.
ENVIRONMENTAL RESEARCH
(2022)
Article
Acoustics
Roberto Zarate Espinosa, Jordi Poblet-Puig, Martin Ortega Brena, Marcelo Lopez-Parra
Summary: The sources of noise and vibration of a refrigerator are characterized by laboratory measurements, helping to improve the refrigerator's acoustic design. The information provided can be used as input data for vibroacoustic simulation models, such as statistical energy analysis.
NOISE CONTROL ENGINEERING JOURNAL
(2021)
Article
Mechanics
Daniel John Jagodzinski, Matthias Miksch, Quirin Aumann, Gerhard Mueller
Summary: This study presents a novel acoustic metamaterial concept developed using additive manufacturing technologies, which can effectively reduce low-frequency structure-borne sound. The numerical modeling and optimization methodology used in this research show that the acoustic metamaterial exhibits a strong ability to minimize structure-borne sound emission within an optimized frequency range.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Environmental Sciences
Philippe Ricaud, Jean-Luc Attie, Remi Chalinel, Frederick Pasternak, Joel Leonard, Isabelle Pison, Elizabeth Pattey, Rona L. Thompson, Zdenek Zelinger, Jos Lelieveld, Jean Sciare, Naoko Saitoh, Juying Warner, Audrey Fortems-Cheiney, Helene Reynal, Jerome Vidot, Laure Brooker, Laurent Berdeu, Olivier Saint-Pe, Prabir K. Patra, Michal Dostal, Jan Suchanek, Vaclav Nevrly, Christine Groot Zwaaftink
Summary: The MIN2OS project aims to monitor global-scale nitrous oxide (N2O) sources by retrieving N2O surface fluxes from space-borne N2O measurements, providing emission estimates on both global and regional scales for various applications. This innovative approach involves the development of a space-borne instrument in the Thermal InfraRed domain and an atmospheric inversion framework to estimate N2O surface fluxes. The project's design includes a new TIR instrument with improved spectral noise and a small payload suitable for dual launch on VEGA-C.
REMOTE SENSING OF ENVIRONMENT
(2021)
Article
Multidisciplinary Sciences
Ling Zhu, David B. Grusky
Summary: In the early 1970s, the gender segregation in the US labor market began to decline as more women entered professions and other male-dominated sectors. However, this decline suddenly stalled at the turn of the century and has not resumed since then. Research indicates that the recent stall can be attributed to a resurgence in intergenerational transmission that reinforces segregation. Fathers are now more likely to pass on male-typed occupations to their sons, while mothers have a more neutral transmission outcome. This U-turn in intergenerational processes has contributed to the U-turn in gender segregation.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Acoustics
Shu Yue, Hong Hou
Summary: A method based on linear array beamforming is proposed to estimate the radiated sound power of moving sound sources by eliminating the Doppler effect through de-dopplerisation interpolation. The estimated results show the effectiveness of the method, which is validated through sound power estimation experiments of double-moving sound sources.
Article
Acoustics
Jon Young, Kyle Myers
Summary: This paper introduces a scalar quantity called Modification Power (MP) to characterize a structure's response to modifications. Perturbed matrix inversion methods are used to calculate the inverse of the modified impedance matrix, which is numerically better conditioned than direct inversion methods, providing information on the magnitude and direction of power flow changes.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Acoustics
Yanjiao Xiong, Xiaoqin Liu, Xing Wu
Summary: This study proposes a method for multi-source localization and sound power estimation based on three-dimensional sound intensity measurement combined with high-precision beamforming. The method accurately identifies the locations of multiple sound sources and determines the sound power. By optimizing the mathematical model and using compressive sensing beamforming estimation method, the computational cost is reduced and the resolution and calculation efficiency are improved.
Article
Acoustics
Jin Mao, Jinfu Du, Kai Liu, Jiang Liu, Yahui Cui
Summary: A method for separating multiple coherent sound sources based on a single measurement surface has been proposed, and its correctness and effectiveness have been verified through numerical simulations and actual experiments.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Acoustics
Jochen Scheck, Barry Gibbs
Article
Acoustics
A. R. Mayr, B. M. Gibbs
Article
Acoustics
H. Kevin Lai, Andy Moorhouse, Barry Gibbs
NOISE CONTROL ENGINEERING JOURNAL
(2016)
Editorial Material
Acoustics
Jian Kang, Barry Gibbs
INTERNATIONAL JOURNAL OF ACOUSTICS AND VIBRATION
(2017)
Article
Acoustics
A. R. Mayr, B. M. Gibbs
ACTA ACUSTICA UNITED WITH ACUSTICA
(2012)
Article
Acoustics
T. H. Alber, B. M. Gibbs, H. M. Fischer
Article
Acoustics
A. Neves e Sousa, B. M. Gibbs
Article
Acoustics
A. Neves e Sousa, B. M. Gibbs
Article
Acoustics
A. R. Mayr, B. M. Gibbs
JOURNAL OF SOUND AND VIBRATION
(2011)
Article
Acoustics
B. M. Gibbs, R. Cookson, N. Qi
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2008)
Article
Acoustics
B. M. Gibbs
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2013)
Article
Acoustics
Christoph Holler, Barry M. Gibbs
ACTA ACUSTICA UNITED WITH ACUSTICA
(2017)
Article
Acoustics
Gary Seiffert, Barry Gibbs
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2010)
Article
Acoustics
Gary Seiffert, Barry Gibbs
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2010)
Article
Acoustics
Sandip Chajjed, Mohammad Khalil, Dominique Poirel, Chris Pettit, Abhijit Sarkar
Summary: This paper reports the generalization of the Bayesian formulation of the flutter margin method, which improves the predictive performance by incorporating the joint prior of aeroelastic modal parameters. The improved algorithm reduces uncertainties in predicting flutter speed and can cut cost by reducing the number of flight tests.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Pascal Zeise, Bernhard Schweizer
Summary: Air ring bearings are an improved version of classical air bearings, providing better damping behavior and allowing operation above the linear threshold speed of instability. However, there is a risk of dangerous vibrations in certain rotor systems, which can be addressed by considering ring tilting effects.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Zbynek Sika, Jan Krivosej, Tomas Vyhlidal
Summary: This paper presents a novel design of a compact six degrees of freedom active vibration absorber with six identical eigenfrequencies. The objective is to completely suppress the vibration of a machine structure with six motion components. By utilizing a Stewart platform structure equipped with six active legs, a spatial unifrequency absorber with six identical eigenfrequencies is achieved. The design is optimized using a correction feedback and active delayed resonator feedback.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Kai Li, Yufeng Liu, Yuntong Dai, Yong Yu
Summary: This paper presents a novel light-powered self-oscillating liquid crystal elastomer (LCE) bow that can self-oscillate continuously and periodically under steady illumination. The dynamics of the LCE bow are theoretically investigated and numerical calculations predict its motion regimes. The suggested LCE bow offers potential advantages in terms of simple structure, customizable size, flexible regulation, and easy assembly.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Carmelo Rosario Vindigni, Giuseppe Mantegna, Calogero Orlando, Andrea Alaimo
Summary: In this study, a simple adaptive flutter suppression system is designed to increase the operative speed range of a wing-aileron aeroelastic plant. The system achieves almost strictly passivity by using a parallel feed-forward compensator implementation and the controller parameters are optimized using a population decline swarm optimization algorithm. Numerical simulations prove the effectiveness of the proposed simple adaptive flutter suppression architecture in different flight scenarios.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Nicco Ulbricht, Alain Boldini, Peng Zhang, Maurizio Porfiri
Summary: The quantification of fluid-structure interactions in marine structures is crucial for their design and optimization. In this study, an analytical solution for the free vibration of a bidirectional composite in contact with a fluid is proposed. By imposing continuity conditions and boundary conditions, the coupled fluid-structure problem is solved and applied to sandwich structures in naval construction, offering insights into the effects of water on mode shapes and through-the-thickness profiles of displacement and stress.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Shahram Hadian Jazi, Mostafa Hadian, Keivan Torabi
Summary: Non-uniformity and damage are the main focus in studying vibrations of beam elements. An exact closed-form explicit solution for the transverse displacement of a nonuniform multi-cracked beam is introduced using generalized functions and distributional derivative concepts. By introducing non-dimensional parameters, the motion equation and its closed-form solution are obtained based on four fundamental functions. The impact of crack count, location, intensity, and boundary conditions on natural frequency and mode shape is evaluated through numerical study.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Eugenio Tramacere, Marius Pakstys, Renato Galluzzi, Nicola Amati, Andrea Tonoli, Torbjoern A. Lembke
Summary: This paper proposes the experimental stabilization of electrodynamic maglev systems by means of passive components, providing key technological support for the Hyperloop concept of high-speed and sustainable transportation.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Pengfei Deng, Xing Tan, He Li
Summary: In this paper, the authors improve the surface morphology method and study the bit-rock interaction model between the rock and the PDC bit, taking into account the impact of blade shape and cutter arrangement. They establish a dynamic model for a deep drilling system equipped with an arbitrary shape PDC bit and propose a stability prediction method. The results show that the shape of the blades and arrangement of the cutters on the PDC bit significantly affect the nonlinear vibration of the drilling system.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Salvador Rodriguez-Blanco, Javier Gonzalez-Monge, Carlos Martel
Summary: In modern LPT designs, the simultaneous presence of forced response and flutter in different operation regimes is unavoidable. Recent evidence suggests that the traditional linear superposition method may be overly conservative. This study examines the flutter and forced response interaction in a realistic low pressure turbine rotor and confirms that the actual response is much smaller than that predicted by linear superposition.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Kabilan Baskaran, Nur Syafiqah Jamaluddin, Alper Celik, Djamel Rezgui, Mahdi Azarpeyvand
Summary: This study investigates the impact of the number of blades on the aeroacoustic characteristics and aerodynamic performance of propellers used in urban air mobility vehicles. The results show that different blade numbers exhibit distinct noise levels, providing valuable insights for further research on propeller noise and aerodynamic performance.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Yongbo Peng, Peifang Sun
Summary: This study focuses on the reliability-based design optimization (RBDO) of the tuned mass-damper-inerter (TMDI) system under non-stationary excitations. The performance of the optimized TMDI system is evaluated using probability density evolution analysis. The results demonstrate the technical advantages of TMDI, including high vibration mitigation performance, considerable mass reduction, and less stroke demand.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Guanfu Lin, Zhong-Rong Lu, Jike Liu, Li Wang
Summary: Vision-based measurement is an emerging method that enables full-field measurement with non-contact and high spatial resolution capabilities. This paper presents a single-camera method for measuring out-of-plane vibration of plate structures using motion-parametric homography to capture image variation and displacement response.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Bronislaw Czaplewski, Mateusz Bocian, John H. G. Macdonald
Summary: Despite two decades of study, there is currently no model that can quantitatively explain pedestrian-generated lateral forces. This research proposes a foot placement control law based on empirical data to calibrate and generalize the rigid-leg inverted pendulum model (IPM) for predicting lateral structural stability.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Justine Carpentier, Jean-Hugh Thomas, Charles Pezerat
Summary: This paper proposes an improved method for the identification of vibration sources on a car window using the corrected force analysis technique. By redefining inverse methods in polar coordinates, more accurate results can be obtained.
JOURNAL OF SOUND AND VIBRATION
(2024)