BRUEL & KJAER 4188 - Page 32

Chapter 2 — Prepolarized Free-field
1
/
2
" Microphone Type 4188
Dynamic Range
Falcon™ Range of Microphone Products
Microphone Handbook
BE1374– 12
2
−
17
Fig.2.18
1
/
3
-octave-band inherent noise spectrum. The shaded bar graphs are the broad-band
(20Hz to 20kHz) noise levels and the white bar graphs the A-weighted noise levels of the
microphone (M),
1
/
2
" Microphone Preamplifier Type 2669 (P) and microphone and pream-
plifier combination (C)
– 5.
0
5
10
15
940716e
20
10 1 k 10 k
100
Frequency (Hz)
MPC
Microphone
and
Preamplifier
Combination
Preamplifier

Microphone

20 k
25
Sound Pressure Level
re 20 µPa (dB)
L

A

L
A
L
A