Optimizing the use of acoustic materials in office buildings [PDF]
Scientific Reports, 2021 Office space designers encounter a challenge in identifying the optimal set of noise control materials to improve the acoustic quality while keeping the cost of selected acoustic materials to a minimum.
Abdullah AlOmani +2 more
doaj +2 more sources
Comparative Study of Photonic Defective Comb-Like Structure by the Green Function and the Transfer Matrix Method [PDF]
E3S Web of Conferences, 2023 In this paper, we investigate the propagation of electromagnetic waves in periodic comblike waveguides structure made of dangling side branches (resonators) and finite waveguides.
Touiss Tarik +5 more
doaj +1 more source
Electromagnetic Filtering with High Performance by one Dimensional Defective Comb-Like Waveguides Structure Using the Transfer Matrix [PDF]
E3S Web of Conferences, 2023 In this paper, we study the propagation of electromagnetic waves in 1D photonic comb-like waveguides (CWGs) structure. This CWGs structure is constituted by a periodicity of segments of length d1 and grafted in each site by one resonator of length d2 ...
Touiss Tarik +3 more
doaj +1 more source
Acoustic Splitter Waves Based on Ramified System Made of Waveguides [PDF]
E3S Web of Conferences, 2023 In this paper, we studied the propagation of acoustic waves in an acoustic ramified system. Our proposed system contains an input waveguide of length d0 and three output lines (three channels), each output line contains a semi-infinite waveguide.
El-atmani Ilham +5 more
doaj +1 more source
Slow acoustic surface modes through the use of hidden geometry
Scientific Reports, 2021 The acoustic surface modes supported by a partly covered periodic meander groove structure formed in an assumed perfectly rigid plate are investigated. This allows one to create a slower acoustic surface wave than can be achieved with the same uncovered ...
S. R. Shelley +3 more
doaj +1 more source
Stealth Acoustic Materials [PDF]
Physical Review Applied, 2019 We report the experimental design of a 1D stealth acoustic material, namely a material that suppresses the acoustic scattering for a given set of incident wave vectors. The material consists of multiple scatterers, rigid diaphragms, located in an air-filled acoustic waveguide.
Romero-Garcia, V. +4 more
openaire +3 more sources
Confined acoustic line modes within a glide-symmetric waveguide
Scientific Reports, 2022 Confined coupled acoustic line-modes supported by two parallel lines of periodic holes on opposite surfaces of a glide-symmetric waveguide have a hybrid character combining symmetric and anti-symmetric properties. These hybrid coupled acoustic line-modes
Daniel B. Moore +5 more
doaj +1 more source
Tailoring the refractive index of impedance-matched ferrite composites
Scientific Reports, 2022 Independent control of the magnetic and electric properties of two-part and three-part ferrite composites is demonstrated through variation of particle size and volume fraction of ferrite inclusions.
L. Parke +4 more
doaj +1 more source
Airborne and Structure-Borne Noise Control in the MB Truck Cabin Interior by the Noise Reduction in the Transmission Path [PDF]
Archives of Acoustics, 2023 In the current study, investigations are made to control the MB truck cabin interior noise by reducing noise in the transmission path. The main sources of cabin noise include the engine, exhaust system, air inlet system, driveline system, and tyres ...
Nader Mohammadi
doaj +1 more source
Surface wave reflection from a metasurface termination
Scientific Reports, 2021 The reflection coefficient of a microwave surface wave incident at the termination of a metasurface is explored. Two different surface types are examined.
S. J. Berry +2 more
doaj +1 more source