Table 2 Parameters of the five Bézier scatterer defining the optimum cloak. A given scatterer is centered at the position with coordinates (x, y). Note that all the scatterers have the same shape parameters, ai. The rest of scatterers forming the cloak are obtained by symmetry operations.

From: Acoustic cloak based on Bézier scatterers

Scatterer Bézier

x (cm)

y (cm)

a 1

a 2

a 3

β

θ degrees

1

3.40

5.59

0.278

0.295

0.360

2.401

319.0°

2

7.00

6.34

0.278

0.295

0.360

3.980

162.8°

3

10.59

2.77

0.278

0.295

0.360

2.313

0.2°

4

3.23

9.51

0.278

0.295

0.360

3.295

177.1°

5

7.75

1.98

0.278

0.295

0.360

4.945

237.5°