EN - 8
3.1.4. ST-107S Microphone
Diameter : 1/2 inch
Polarization voltage : 0V
Dynamic range : 25dBA ~140dB
Sensitivity : -32±3dB (250Hz 0dB=1V/Pa)
Free field frequency response : ±2dB(25Hz
12.5kHz)
Frequency (KHz)
Deviation of pressure
0.25
0.0
1
-0.1
2
-0.5
3
-0.6
4
-0.9
5
-1.2
6
-1.7
7
-2.2
8
-2.8
9
-3.3
10
-4.1
12.5
-6.0
3.2. Measurement Procedures
!
Press
button turn on sound level meter
press this button again turn
off sound level meter
!
Press
button to select test function.
Lxyp
→
Leq
→
LAE
→
PeakMAX
→
RT60
!
Press
button to select time weighting.
Fast
→
Slow
→
Impulse
!
Press
button to select frequency weighting.
A weighting
→
C weighting
→
Z weighting
!
Press
button start test, press
button again pause test
!
Press
button stop test
Turn on the meter deform test mode is Lxyp mode; A weighting; Fast weighting
