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PML
PM
L
PM
L
x
y
obv1 (Ni1+10, Nj1+10)
obv2(Nic, Njc)
obv3(Ni2-1, Nj2-1)
src (Ni1+1, Nj1+1)
PMLPML
PML PML
PM
L
PM
L
200 µm
200 µm
−200 µm
−200 µm
c0 = 1500 m/s
�0 = 1000 kg/m3
0 0.2 0.4 0.6−1
−0.5
0
0.5
1
(b)
time (ms)
ampli
tude
excitationobv1 obv2 obv3
0.3 0.4 0.5 0.6 0.7−1
−0.5
0
0.5
1
R = 99.24%Dt = 0.1705 ms
(c)
time (ms)
ampli
tude
aligned excitationobv3
0 100 200 300 400 5000
0.2
0.4
0.6
0.8
1(d)
distance (mm)
ampli
tude
simulationtheory
−2000
200 −2000
200
0.992
0.994
0.996
0.998
x−axis (mm)
(e)
y−axis (mm)
Norm
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f. (
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PML PML
PM
L
PM
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400 µm
400 µm−400 µm
−400 µm
c0 = 1500 m/s
�0 = 1000 kg/m3
0 0.2 0.4 0.6−1
−0.5
0
0.5
1
time (ms)
ampl
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0.2 0.3 0.4 0.5−1
−0.5
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R = 99.98%Dt = 0.2543 ms
time (ms)
ampl
itud
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(c)
0.45 0.5 0.55 0.6 0.65−1
−0.5
0
0.5
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R = 99.92%Dt = 0.5098 ms
time (ms)
ampl
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(d)
0 0.2 0.4 0.6−400
−200
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200
400
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c0 = 1500 m/s
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400 µm−400 µm
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�1 = 800 kg/m3
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time (ms)
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400
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c0 = 1500 m/s
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400 µm
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time (ms)
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ampl
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−400 −200 0 200 4000
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0.8
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ampl
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