scholarly journals Near-field acoustic resonance scattering of a finite bessel beam by an elastic sphere

2014 ◽  
Vol 61 (4) ◽  
pp. 696-704 ◽  
Author(s):  
F. G. Mitri
Keyword(s):  
Near Field ◽  
Bessel Beam ◽  
Acoustic Resonance ◽  
Resonance Scattering ◽  
Elastic Sphere

Field Computation for Two-Dimensional Array Transducers with Limited Diffraction Array Beams

2005 ◽  
Vol 27 (4) ◽  
pp. 237-255 ◽  
Author(s):  
Jian-Yu Lu ◽  
Jiqi Cheng
Keyword(s):  
Continuous Wave ◽  
Weighting Function ◽  
Near Field ◽  
Bessel Beam ◽  
Two Dimensional ◽  
Axially Symmetric ◽  
Computationally Efficient ◽  
Annular Array ◽  
Array Transducer ◽  
Analytical Expressions

A method is developed for calculating fields produced with a two-dimensional (2D) array transducer. This method decomposes an arbitrary 2D aperture weighting function into a set of limited diffraction array beams. Using the analytical expressions of limited diffraction beams, arbitrary continuous wave (cw) or pulse wave (pw) fields of 2D arrays can be obtained with a simple superposition of these beams. In addition, this method can be simplified and applied to a 1D array transducer of a finite or infinite elevation height. For beams produced with axially symmetric aperture weighting functions, this method can be reduced to the Fourier-Bessel method studied previously where an annular array transducer can be used. The advantage of the method is that it is accurate and computationally efficient, especially in regions that are not far from the surface of the transducer (near field), where it is important for medical imaging. Both computer simulations and a synthetic array experiment are carried out to verify the method. Results (Bessel beam, focused Gaussian beam, X wave and asymmetric array beams) show that the method is accurate as compared to that using the Rayleigh-Sommerfeld diffraction formula and agrees well with the experiment.

The effects of material attenuation on acoustic resonance scattering from cylindrical tubes

Ultrasonics ◽  
1996 ◽  
Vol 34 (7) ◽  
pp. 737-745 ◽  
Author(s):  
Jong Po Lee ◽  
Ji Ho Song ◽  
Myoung Seon Choi
Keyword(s):  
Acoustic Resonance ◽  
Resonance Scattering ◽  
Cylindrical Tubes

Acoustic Resonance Scattering

1994 ◽  
Vol 95 (5) ◽  
pp. 2786-2786 ◽  
Author(s):  
Kevin Williams
Keyword(s):  
Acoustic Resonance ◽  
Resonance Scattering

Acoustic resonance scattering by a penetrable cylinder

1983 ◽  
Vol 73 (5) ◽  
pp. 1448-1455 ◽  
Author(s):  
Donald Brill ◽  
G. C. Gaunaurd
Keyword(s):  
Acoustic Resonance ◽  
Resonance Scattering

scholarly journals Near-field interaction of two-dimensional high-permittivity spherical particle arrays on substrate in the Mie resonance scattering domain

2010 ◽  
Vol 18 (26) ◽  
pp. 27226 ◽  
Author(s):  
Yuto Tanaka ◽  
Go Obara ◽  
Akira Zenidaka ◽  
Nikolay N Nedyalkov ◽  
Mitsuhiro Terakawa ◽  
...  
Keyword(s):  
Spherical Particle ◽  
Near Field ◽  
Resonance Scattering ◽  
Two Dimensional ◽  
Field Interaction ◽  
High Permittivity ◽  
Mie Resonance
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