Prediction of sound pressure in the far field using the inverse boundary element method

2010 ◽  
Vol 58 (1) ◽  
pp. 74 ◽  
Author(s):  
D. W. Herrin ◽  
J. Liu ◽  
F. Martinus ◽  
D. J. Kato ◽  
S. Cheah
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Sound Pressure ◽  
Far Field ◽  
Inverse Boundary ◽  
Element Method

Using the Inverse Boundary Element Method to Predict Sound Pressure in the Far Field

2008 ◽  
Author(s):  
D. W. Herrin ◽  
J. Liu ◽  
J. Han ◽  
S. Cheah ◽  
D. J. Kato
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Sound Pressure ◽  
Near Field ◽  
Numerical Procedure ◽  
Far Field ◽  
Pressure Measurements ◽  
Inverse Boundary ◽  
Field Sound ◽  
Element Method

The inverse boundary element method (BEM) is a numerical procedure whereby sound pressure measurements in the near field are used to predict the vibration on the vibrating surface. After the vibration (or particle velocity for an opening) is determined, the sound pressure in the far field can be predicted using a forward BEM analysis. This paper will examine a particular example where the far field sound pressure was predicted for a generator set. The results indicate that the vibration predicted by the inverse BEM can be used to accurately predict the sound pressure as far away as 7 meters from the source.

Comparisons of regularization methods and regularization parameter selection methods in sound source identification using inverse boundary element method

2019 ◽  
Vol 67 (3) ◽  
pp. 219-227
Author(s):  
Youhong Xiao ◽  
Qingqing Song ◽  
Shaowei Li ◽  
Guoxue Lv ◽  
Zhenlin Ji
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Transfer Matrix ◽  
Sound Source ◽  
Source Identification ◽  
Regularization Parameter ◽  
Vibration Velocity ◽  
Regularization Methods ◽  
Inverse Boundary ◽  
Element Method

In noise source identification based on the inverse boundary element method (IBEM), the boundary vibration velocity is predicted based on the field pressure through a transfer matrix of the vibration velocity and field pressure established on the Helmholtz integral equation. Because the matrix is often ill-posed, it needs to be regularized before reconstructing the vibration velocity. Two regularization methods and two methods of selecting the regularization parameter are investigated through the simulation analysis of a pulsating sphere. The result of transfer matrix regularization is further verified through the reconstruction of the vibration of an aluminum plate. Additionally, to reduce the large errors at some frequencies in the reconstruction result, increasing the number of measuring points is more effective than reducing the distance between the measurement plane and the sound source.

An inverse boundary element method computational framework for designing optimal TMS coils

2018 ◽  
Vol 88 ◽  
pp. 156-169 ◽  
Author(s):  
Clemente Cobos Sánchez ◽  
Francisco Javier Garcia-Pacheco ◽  
Jose Maria Guerrero Rodriguez ◽  
Justin Robert Hill
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Computational Framework ◽  
Inverse Boundary ◽  
Element Method

E-coil: an inverse boundary element method for a quasi-static problem

2010 ◽  
Vol 55 (11) ◽  
pp. 3087-3100 ◽  
Author(s):  
Clemente Cobos Sanchez ◽  
Salvador Gonzalez Garcia ◽  
Henry Power
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Static Problem ◽  
Inverse Boundary ◽  
Element Method
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