Mufflers are widely used for exhaust noise attenuation in vehicles and machinery. Recent advances in modeling procedures for accurate performance prediction have led to the development of modeling methods for practical muffler components in commercial design. Muffler designers need simple and fast modeling tools, especially in the preliminary design evaluation stages. Finite Element and Boundar...

The transfer matrix method (TMM) is commonly employed for wave propagation analysis in layered media of fluid, elastic and porous nature. Up to now it has been used extensively analyze airborne sound transmission absorption. Its use impact investigated a limited extent, i.e. thick homogeneous plates infinite extent specific receiver points. This contribution aims broaden the scope such that glo...

This paper reviews the current progress in mathematical modeling of anti-reflective subwavelength structures. Methods covered include effective medium theory (EMT), finite-difference time-domain (FDTD), transfer matrix method (TMM), the Fourier modal method (FMM)/rigorous coupled-wave analysis (RCWA) and the finite element method (FEM). Time-based solutions to Maxwell's equations, such as FDTD,...

We design terahertz (THz) surface-plasmonresonance (SPR) sensors using a ferroelectric polyvinylidene fluoride (PVDF) thin layer for biological sensing. The reflectivity properties based on SPR are described using transfer matrix method (TMM) and numerically simulated using finite-difference time domain (FDTD) method. The sensing characteristics of the structure are systematically analyzed thro...

The transmission coefficient and electronic conductance of a graphene monolayer modulated by multi-electrostatic barriers are theoretically investigated with the transfer matrix method (TMM). coefficient, conductance, Fano factor evaluated as function number width barriers, angle/energy incidence, well applied potential at each barrier. We find that exhibits series resonances depends on widths ...