3M SE-400 user manual Pressure Field to

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Data Addendum

Pressure to free field corrections with BK4936 microphone and RICR (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.

	BK4936 microphone
	Pressure Field to
	Free Field
Frequency	Corrections
in Hz	in dB

32	0.1
40	0.0
50	-0.1
63	-0.1
80	-0.1
100	-0.1
125	-0.1
160	-0.1
200	0.0
250	0.0
315	0.2
400	0.2
500	0.2
630	0.2
800	0.1
1000	0.0
1250	0.2
1600	0.4
2000	0.7
2500	1.0
3150	1.5
4000	2.5
5000	3.4
6300	5.0
8000	6.8
10000	9.1
12500	10.3
16000	10.5

Sound Examiner SE-400 Series