Results 201 to 210 of about 546,551 (249)
Some of the next articles are maybe not open access.
A comparison of compressive equivalent source methods for distributed sources
The Journal of the Acoustical Society of America, 2020Sparse sound-field reconstruction methods based on compressive sensing and the equivalent source method have gained a lot of interest in recent years, offering a wide frequency range. An irregular array must be employed, and the sound field must be representable by a sparse vector of source-model amplitudes.
openaire +2 more sources
Application of the equivalent source method to directional noise sources
Noise Control Engineering Journal, 2012Prediction of noise levels at long ranges from such sources as flying aircraft or moving ground vehicles is an important practical problem. When terrain, wind, and atmospheric effects are taken into account, this problem cannot be solved analytically, and, thus, numerical solutions are required.
Sergey N. Vecherin +2 more
openaire +1 more source
Review: The Use of Equivalent Source Method in Computational Acoustics [PDF]
Journal of Computational Acoustics, 2017 This paper reviews the equivalent source method (ESM), an attractive alternative to the standard boundary element method (BEM). The ESM has been developed under different names: method of fundamental solutions, wave superposition method, equivalent source method, etc. However, regardless of the method name, the basic concept is very similar; that is to
Seongkyu Lee
exaly +2 more sources
An investigation on source distribution characteristics obtained with the equivalent sources method
The Journal of the Acoustical Society of America, 2002Although the equivalent sources method is frequently used to solve acoustics radiation and scattering problems, very few investigations focus on the behavior of source distributions obtained as solutions, as well as on the general properties and restrictions these solutions must fulfill.
Yves Gounot +2 more
openaire +1 more source
Application of the equivalent source method to outdoor directional sound sources
The Journal of the Acoustical Society of America, 2011Many outdoor sound sources, such as aircraft and moving ground vehicles, exhibit directional sound radiation patterns that can be measured in the far field. However, this information is insufficient for specifying a source function that can be used in propagation algorithms.
Sergey N. Vecherin +2 more
openaire +1 more source
Aeroacoustic Scattering via the Equivalent Source Method
10th AIAA/CEAS Aeroacoustics Conference, 2004A computational method for predicting the scattering of incident engine noise by an airframe in a uniform flow field has been developed. The method is based on the equations of time harmonic, linearized acoustics and employs the equivalent source method for solving an exterior Helmholtz equation boundary value problem. Details of the governing equation
Mark Dunn, Ana Tinetti
openaire +1 more source
Comparison of methods for measurement of equivalent source match
2015 European Microwave Conference (EuMC), 2015Equivalent source match is a quantity of a 3-port device, which is needed for power sensor calibration. The Juroshek method, a direct 3-port method and an indirect 2-port method for measuring equivalent source match are tested with different definitions of the calibration standards being used.
Johannes Hoffmann +3 more
openaire +1 more source
Inverse scattering for conductors by the equivalent source method
IEEE Transactions on Antennas and Propagation, 1996The inverse scattering for two-dimensional conductors is investigated. Assume that an incident wave is incident upon conducting cylinders of unknown shape and the scattered field is measured outside. By properly processing the scattering data, the position and shape of the conducting scatterers can then be reconstructed.
null Chai-Yu Lin, null Yean-Woei Kiang
openaire +1 more source
A surface element formulation of the equivalent source method
The Journal of the Acoustical Society of America, 1999A time-domain formulation of the equivalent source method which uses planar surface elements is presented. The boundary condition of a closed surface can be fulfilled using monopole elements for boundary conditions specifying the normal velocity, the sound pressure, or the local impedance. By interpreting the equivalent sources as double layers of free-
U. Peter Svensson +3 more
openaire +1 more source
Journal of Vibration and Acoustics, 2018
The equivalent source method (ESM) and monopole time reversal method (MTRM) are two popular techniques for noise source localization. These two methods have some similar characteristics, such as using the pressure field measured by a microphone array as the input and using similar propagation matrices obtained from the Green's function.
Chuan-Xing Bi +3 more
openaire +1 more source
The equivalent source method (ESM) and monopole time reversal method (MTRM) are two popular techniques for noise source localization. These two methods have some similar characteristics, such as using the pressure field measured by a microphone array as the input and using similar propagation matrices obtained from the Green's function.
Chuan-Xing Bi +3 more
openaire +1 more source