This study offers a comprehensive investigation into the parameters affecting the sound transmission characteristics of a double-walled sandwich magneto-electro-elastic cross-ply layered plate resting on viscoelastic medium in thermal environment. To this end, the walls of this sandwich structure are modeled based on the assumptions of the first-order shear deformation theory. The governing equations are derived via a coupled set of equations targeting vibration and acoustic aspects of the problem after the application of Hamilton's principle. The obtained equations are then solved by the implementation of double Fourier series and the second velocity potential, giving an accurate estimation of sound transmission loss under initial magnetic and electric potentials, variations of temperature, ply angle, acoustic cavity depth, incident angle of sound waves, and viscoelastic parameters.
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http://dx.doi.org/10.1038/s41598-022-20965-3 | DOI Listing |
Elife
December 2024
Experimental Otology Group, InnerEarLab, Department of Otolaryngology, University Medical Center Göttingen, Göttingen, Germany.
To encode continuous sound stimuli, the inner hair cell (IHC) ribbon synapses utilize calcium-binding proteins (CaBPs), which reduce the inactivation of their Ca1.3 calcium channels. Mutations in the gene underlie non-syndromic autosomal recessive hearing loss DFNB93.
View Article and Find Full Text PDFSci Rep
December 2024
Key Laboratory of Urban and Architectural Heritage Conservation, Ministry of Education, School of Architecture, Southeast University, 2# Sipailou, Nanjing, 210096, China.
Lightweight double leaf walls have been extensively employed in assembly and large-space buildings. Due to the complex and varied stud configurations in double leaf walls, accurately and efficiently predicting the sound transmission loss (STL) of such structures poses a significant challenge. To support performance-based design workflows, this paper presents an analytical model based on sound transmission path decoupling, enabling architects to quickly predict the STL of commonly used lightweight double leaf wall types, including wooden, steel, and acoustical stud constructions.
View Article and Find Full Text PDFZhonghua Yu Fang Yi Xue Za Zhi
December 2024
Department of Allergy, ShengJing Hospital of China Medical Universty, Shenyang110000, China.
Ragweed, as an exotic invasive species, which is one of the most important allergens for hay fever, has been invading China for more than 80 years. The increasing number of people with hay fever makes effective treatment, as well as the prevention and control of pollen transmission critical. This article delves into a comprehensive research summary focusing on the allergenic properties of ragweed pollen, its pathogenic characteristics, epidemiological patterns, monitoring and control measures, as well as concentrated management approaches.
View Article and Find Full Text PDFPhys Med Biol
December 2024
Department of Medical Physics and Bioengineering, University College London, Gower Street, London, WC1E 6BT, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND.
Transcranial ultrasound is used in a variety of treatments, including neuromodulation, opening the blood-brain barrier (BBB), and high intensity focused ultrasound (HIFU) therapies. To ensure safety and efficacy of these treatments, numerical simulations of the ultrasound field within the brain are used for treatment planning and evaluation. This study investigates the accuracy of numerical modelling of the propagation of focused ultrasound through cranial bones.
View Article and Find Full Text PDFJ Acoust Soc Am
December 2024
PIMM Laboratory, UMR 8006, Arts et Metiers Institute of Technology (ENSAM), CNRS, Cnam, 151 boulevard de l'Hôpital, 75013, Paris, France.
During its propagation, a shock wave may come across and interact with different perturbations, including acoustical waves. While this issue has been the subject of many studies, the particular acoustic-acoustic interaction between a weak shock and a sound wave has been very scarcely investigated. Here, a theory describing the encounter of those two waves is developed, up to second- and third-order.
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