3M Version A: QE7052 Figure L.7- Pressure Field to Free Field Corrections, Table L.9 -Broadband

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Microphones

BK4936 microphone with random incidence corrector using a remote preamp (Figures/Tables “L”)

Figure L.7- Pressure Field to Free Field Corrections

	BK4936
	R.I.C.
Frequency	Correction
in Hz	in dB

1250.04

2500.00

1000	0.20
2000	0.69
4000	2.09

Figure L.8 -Pressure Field to Random Incidence Corrections

	BK4936
	R.I.C.
Frequency	Correction
in Hz	in dB

1250.05

2500.00

1000	0.14
2000	0.49
4000	1.05

Self Generated Noise

Table L.9 -Broadband

		SPL			LEQ
			Fast Response
Range
(dB)	A Weighting	C Weighting	Z Weighting	A Weighting	C Weighting	Z Weighting
-20 to 70	22.9	30.1	37.4	22.8	30.1	37.0
-10 to 80	22.8	29.8	37.1	22.8	30.3	37.2
0 to 90	22.8	30.2	36.6	22.8	30.2	37.3
10 to 100	22.8	30.0	36.6	22.8	30.2	37.6
20 to 110	23.3	30.3	36.5	23.3	30.5	37.5
30 to 120	26.2	31.4	36.8	26.2	31.1	37.1
40 to 130	33.3	34.4	38.2	33.4	34.6	38.9
50 to 140	42.1	42.1	43.1	42.1	42.2	42.8
			Slow Response
Range
(dB)	A Weighting	C Weighting	Z Weighting	A Weighting	C Weighting	Z Weighting
-20 to 70	22.8	30.3	37.4	22.8	30.3	37.7
-10 to 80	22.8	30.3	37.4	22.7	30.3	37.7
0 to 90	22.8	30.2	37.5	22.8	30.2	37.5
10 to 100	22.8	30.2	37.9	22.7	30.2	37.6
20 to 110	23.3	30.2	37.5	23.3	30.3	37.3
30 to 120	26.2	31.0	37.6	26.2	31.0	37.9
40 to 130	33.4	34.6	38.6	33.4	34.6	38.5
50 to 140	42.2	42.1	43.0	42.2	42.1	42.9

053-469 RevC

SoundPro models SE and DL Data Addendum