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9
Polar diagram
Frequency response curve
0
°
5
1
0
1
5
20
2
5
dB
30
°
60
°
90
°
30
°
60
°
90
°
12
0
°
1
50
°
1
80
°
1
50
°
12
0
°
2
000
H
z
4
000
H
z
8000
H
z
1
6000
H
z
12
5
H
z
2
50
H
z
500
H
z
1
000
Hz
0
- 4
0
-
50
-
60
- 7
0
-
80
2
0
50
1
00
2
00
500
1
000
2
000
5000
1
0000
2
0000
Hz
0
°
1
80
°
-
30
d
B
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e908_511912_0206_Sp6.book Seite 9 Freitag, 24. März 2006 2:56 14