BRUEL & KJAER 4230 Instructions And Applications page 8

6
15
dB
10
-5
-10
- 1
5
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Excess of P. over
P, /
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1kHz
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4 5 5 7 8 9 10
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15 20
30 40 50 70
/6 9/S4
b
~ld correctio~s
for Type 4133 and 4134
v
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with protect ing grid
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2kHz 3 4 5
10
15 20
30 40 so 70 100
15~ 619 :.,oo
Fig. 2.3. Pressure characteristics with B & K 1" and
1 /2" Microphones.
,..