FAMILY 4939

1/4" FREE-FIELD MICROPHONE, EXT. POLARIZED

Free-field microphone designed for high-level and high-frequency measurements over a frequency range of 4 Hz to 100 kHz.

FAMILY 4939

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Using stainless steel diaphragm and protection grid, Type 4939 Microphone is built to withstand rough environments and can be used in high-temperature measurements up to 150°C (302°F).

The microphone requires an external polarization voltage and must therefore be used with a classical preamplifier. Externally polarized microphones can be used at higher temperatures without severe changes in measurement sensitivity.

High-level measurements
High-frequency measurements
Model work

Code	Actions	Price	Availability	Sensitivity [mV/Pa]
-4939-A-011-				4 mV/Pa
-4939-L-002-				3.5 mV/Pa
-4939-C-002-				3.5 mV/Pa

File	Description	Type	Languages	Size
TEDS Microphones		Technical Document	English	249 KB

FAMILY 4939
Standard	IEC 61094
Sound field	Free field
Polarization	Classical
Sensitivity [mV/Pa]	3.5 mV/Pa, 4 mV/Pa
Lower frequency [Hz]	4 Hz
Higher frequency [Hz]	100 kHz
Lower dynamic range [dB]	35 dB
Higher dynamic range [dB]	164 dB
Diameter	1/4 inch
Venting	Side
Minimum Temperature [°C]	-20 °C
Maximum Temperature [°C]	80 °C
Minimum Temperature [°F]	-4 °F
Maximum Temperature [°F]	176 °F
Output signal (connectivity)	Passive

Product Code	Description
DB-0757---	Cement Stud M3, D8mm, Single Unit
JJ-0032---	Adaptor 10-32 UNF(F) to 10-32 UNF(F)
UA-1216---	Accessories, Insulated Studs, M3 to M3,
YQ-2007---	Screw M3 x 8mm, DIN 916
-4294---	Calibrator Accel, Hand-Held, by Battery
JP-0162---	Adaptor TNC(M) to 10-32 UNF(F) str.
YJ-0216---	Micro Wax 3971, white, for Accel
YQ-2003---	Screw M3 x 5mm, DIN 916
QS-0007---	Adhesive,SuperFastInstant,cyanoacrylate
QA-0041---	Thread Tap, M3, HHS ISO 529, 3x0.5
QA-0042---	Hex Key 2.5mm for Metric Socket Screws
UA-1075---	Mounting Magnets (UA1077), M3 thread, se