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Appendix A
130
Models SE and DL
denser (200 volts must be set to “On”). Use for general, higher-level, free-
field measurements.
QE4150 - Free-field, Class/Type 1 (optional) ½-inch diameter (.52"), con-
denser (200 volts must be set to “On”). Use for general free-field measure-
ments.
QE4170 - Pressure, Class/Type 1 (optional), 1-inch diameter (.938"), con-
denser (200 volts must be set to “On”). Use for coupler measurements, audi-
ometer calibration, low-frequency measurements, low level measurements
(due to low noise floor) or as a laboratory standard.
Characteristic
BK4936
QE7052
QE4110
QE4130
QE4150
QE4170
Accuracy
Class 1
Class 2
Class 1
Class 1
Class 1
Class 1
Polarization
Electret
Electret
200V
200V
200V
200V
Diameter (inches)
½
½
¼
½
½
1
Response
characteristic
Free- Field Free- Field Free- Field
Free- Field Free- Field
Pressure
Frequency response
(± 2 dB)
8 Hz to 20 kHz 20 Hz to 17
kHz
20 Hz to
24.5 kHz
5 Hz to 24.5
kHz
5 Hz to 20
kHz
3 Hz to 10
kHz
Sensitivity (dBV)
-28
-29
-49.1
-36
-26
-26
Sensitivity (mV)
40
35
3.5
15.8
50
50
dB noise (1 kHz third
-
octave band)
0 0 - 10 0 -1
dBA noise
22
22
-
32
22
18
dBC noise
31
31
-
41
31
21
dBZ noise
35
35
-
45
35
25
dBF noise
40
40
-
50
40
33
Mic range dBA min.
(recommended)
27 27 60 37 27 23
dB Peak
142
143
167
150
143
140
Nominal capacitance
(pF)
12 15 6.5 18 18 60
Part number
059-523
056-317
059-413
058-659
058-489
058-488
AC/DC outputs
Connector - One 3.5 mm stereo plug connector for both AC and DC outputs.
AC output ~ Meter 1 output, and includes the frequency response setting for
that meter. The AC output is affected by the instrument’s range setting.
DC output - Meter 1 output, and includes the effects of the time response
and frequency weighing for the meter.