BRUEL & KJAER 4230 - Page 7

Procedure
1. Place the microphone into the coupler of the calibrator (Fig.2.2)
2. Press the button on the calibrator
3. Adjust the sound level meter to read according to the following
table:
Fig. 2.2. Calibrator fitted on 2205 Sound level meter.
Microphone used
Pressure
4132,4144
type
4134
Free field
4117,4131
type
4145
4133,4148
Sound Level or Sound
Pressure Level
94
dB
93.6 dB
93.8 dB
5