EN - 7
3.1.3. ST-109 Microphone
Diameter : 1/2 inch
Polarization voltage : 0V
Dynamic range : 25dBA ~140dB
Sensitivity : -26±2dB
Free field frequency response :
Frequency (KHz)
Deviation pressure
0.25
0
0.30
0
0.40
0
0.50
0.1
0.63
0.1
0.80
0.1
1.0
0.2
1.25
0.3
1.60
0.4
2.0
0.5
2.5
0.6
3.15
0.7
4.0
0.8
5.0
1.3
6.3
1.9
8.0
2.8
10
4.1
12.5
6.0
16.0
7.3
20.0
9.1