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Eighth-inch Condenser Microphone
Microphone Cartridge Type 4138
Cathode Follower Type 2615
with Adaptor UA 0036
Precision condenser microphone for special
measurement purpose
.
Each microphone is
individually
calibrated.
Frequency-range
of
calibration
:
30 Hz -
140 kHz
.
Dynamic range
:
76-184 dB
.
BRUEL& IK'-'AC.R
NA:.RUM,
DENMARK.
Teleph
.:
80 05
00.
Cable
:
BRUKJA.
Telex
:
5316.
COPENHAGEN
B B 4138
-
0
3
00011
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