BRUEL & KJAER 2230 - Page 39

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E
Q)
c
0
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a:
~
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8
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-g
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.D
8
c
2
u
Q)
0
u
10
8
6
4
2
0
-2
- 4
- 6
1
I I
I
Free Field Corrections for
- Microphone 4165
with Protection Grid
--::::::::
f::;::::::==
I
~~ ~ 0
-
I f I
2 3
4
/0 0
~
/
30 °
vV
~
vv
60°
~
~
--- ...
v --~
RANDOM
~
~
v
I-'
........
~
!-- .....
!;' 1.---.
--
~K"
"'
--
~---
k:::
~
~
~'\
goo
~
180°
150°
120°
5 6 7 8 9 10 15 20 30
40 50
Frequency, kHz
80106 1
Fig. 5.8. Free Field Corrections for Microphone Type 4155 with Pro-
tection Grid
33