3M SE-400 user manual Microphone Weighting

41

Data Addendum

Linear operating range with SPL Z-Weighting and LEQ Z-Weighting (sections: 5.5.10, 5.5.11, 9.2.7e, 9.3e, 9.3f)

Note: Reference level 114 dB, Cal Point: 400mVrms = 114 dB @ 1 kHz

Frequency	SPL Z-Weighting		LEQ Z-Weighting
	Linear Operating Range (dB)		Linear Operating Range (dB)
31.5	44	140	44	140
1000	44	140	44	140
4000	44	140	44	140
8000	44	140	44	140
12500	44	140	44	140

Electrical signal input (sections: 5.1.15, 9.3)

The equivalent input voltages for Type/Class 1 and Type/Class 2 at 1 kHz are listed below.

Maximum input level (sections: 5.1.16, 9.3i)

The maximum acoustic input level is 150 dB. The maximum level at the electrical input is 11 VAC.

Self generated noise levels (sections: 5.6.1 5.6.2 5.6.3, 9.3)

Level of self-generated noise in decibels (dB). Applies to time average and both fast and slow time weighting.

To measure 12 pF 50 Ohm connect a standard 50 Ohm terminator to the 073-738,12 pF 50 Ohm input adapter, to the preamp input.

Microphone	A-Weighting	C-Weighting	Z-Weighting
QE4936	26.1	29.6	34.9
QE7052	28.3	30.8	35.4
12 pF 50 Ohm input adapter	25.6	29.3	34.9

Sound Examiner SE-400 Series