3M SE-401 - QE7052 Microphone - Random Incidence Corrections; Random Incidence Corrections for QE7052

Data Addendum
Sound Examiner SE-400 Series
65
Pressure to free field corrections with QE7052 microphone (sections: 5.2.8, 9.2.7d)
Note: add to pressure response to get 0⁰incidence free-field response. B&K 4226 calibrator may be used to determine the
pressure field response.
Frequency
in Hz
QE7052 microphone
Pressure Field to
Free Field
Corrections
in dB
32
0.1
40
-0.1
50
0.0
63
-0.1
80
-0.2
100
-0.3
125
-0.3
160
-0.3
200
0.0
250
0.1
315
0.1
400
0.1
500
0.1
630
0.1
800
0.0
1000
0.0
1250
0.0
1600
0.2
2000
0.4
2500
0.5
3150
0.5
4000
1.3
5000
2.3
6300
4.4
8000
5.0
10000
4.5
12500
5.6
16000
7.9