Results 121 to 130 of about 1,592,702 (395)
Jurnal Rekayasa Kimia & Lingkungan, 2009 The probability of application of palm fibre from arenga pinnata appear as best treatment for sound absorption material which can be used in controlling noise.
Zulfian Zulfian, Muhammad Sajidin
doaj +2 more sources
On the amplification of sound (acoustic phonons) by absorption of laser radiation in cylindrical quantum wires [PDF]
arXiv, 2002 Based on the quantum transport equation for the electron-phonon system, the absorption coefficient of sound (acoustic phonons) by absorption of laser radiation in cylindrical quantum wires is calculated for the case of monophoton absorption process and the case of multiphoton absorption process.
arxiv
Design and demonstration of an acoustic right-angle bend [PDF]
, 2017 In this paper, we design, fabricate and experimentally characterize a broadband acoustic right-angle bend device in air. Perforated panels with various hole-sizes are used to construct the bend structure. Both the simulated and the experimental results verify that acoustic beam can be rotated effectively through the acoustic bend in a wide frequency ...
arxiv +1 more source
Reduced order modelling using parameterized non-uniform boundary conditions in room acoustic simulations [PDF]
arXiv, 2022 Quick simulations for iterative evaluations of multi-design variables and boundary conditions are essential to find the optimal acoustic conditions in building design. We propose to use the reduced basis method (RBM) for realistic room acoustic scenarios where the surfaces have inhomogeneous acoustic properties, which enables quick evaluations of ...
arxiv
Advanced Functional Materials, EarlyView.This study demonstrates an alternative method of creating charge‐stable negatively charged nitrogen vacancy (NV−) centers close to the diamond surface without high‐temperature annealing. By illuminating nitrogen‐implanted regions with a continuous‐wave 405 nm laser, NV− centers are induced, exhibiting electron spin coherence properties suitable for ...
Jens Fuhrmann +4 more
wiley +1 more source
Application of Cellulose and Paper-Based Products in Building Acoustics
Archives of AcousticsThis article presents a comprehensive acoustic study of paper-based building products: cellulose wool, paperboard, corrugated cardboard, and honeycomb panels. The material configurations included the intact form as well as the various modifications, i.e.,
Aleksandra Klimek +3 more
semanticscholar +1 more source
Acoustic absorption of structural membranes
, 2021 A series of tests have been carried out to measure the absorption coefficient of structural membranes as well as some combinations used to improve ...
openaire +1 more source
Effect of Painting on the Sound Absorption of Acoustic Materials [PDF]
The Journal of the Acoustical Society of America, 1940 A brief discussion is given of the properties of a material which cause it to absorb sound. Photographs are shown and the results of sound absorption measurements before and after painting are given for a number of different types of material. A brief discussion is given of the kind of paint which can be used and how it should be applied.
openaire +3 more sources
Omnidirectional Transmissive Acoustic Metasurfaces Based on Goldberg Polyhedra
Advanced Functional Materials, EarlyView.This study introduces omnidirectional acoustic metasurfaces capable of manipulating wavefronts in multiple arbitrary directions simultaneously. A full‐stack pipeline for design, optimization, and fabrication is presented to construct near‐spherical holograms based on Goldberg polyhedra.
Andrea Achilleos +3 more
wiley +1 more source
Transducer Materials Mediated Deep Brain Stimulation in Neurological Disorders
Advanced Functional Materials, EarlyView.This review discusses advanced transducer materials for improving deep brain stimulation (DBS) in neurological disorders. These materials respond to light, ultrasound, or magnetic fields, enabling precise, less invasive neuromodulation. Their stimulus‐responsive properties enhance neural control and adaptive therapy, paving the way for next‐generation ...
Di Zhao +5 more
wiley +1 more source