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12
Polar diagram
Frequency response curve
°
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
-
50
-
60
- 7
0
-
80
-
90
2
0
50
1
00
2
00
500
1
000
2
000
5000
1
0000
2
0000
Hz
0
°
, 1
m
0
°
, 5 c
m
- 4
0
d
B
v