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FAMILY 4138

1/8" PRESSURE-FIELD MICROPHONE, EXTERNALLY POLARIZED

Pressure-field microphone designed for very high-frequency measurements in confined spaces with a frequency range of 6 Hz to 140 kHz.

FAMILY 4138

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Type 4138 is designed for high-level and very high-frequency measurements and measurements in confined spaces. Being externally polarized, Type 4138 must be used with a classical preamplifier.

High-level and very high-frequency measurements
Applications which require a high degree of spatial resolution or where space is limited, for example, model testing

Filter

Sensitivity keyboard_arrow_down

Code	Sensitivity
-4138-A-015-	0.56 mV/Pa
-4138-C-006-	0.8 mV/Pa
-4138-L-006-	0.8 mV/Pa

1/8-inch Pressure-field Microphone Type 4138

Data Sheets

English

FAMILY 4138
Standard	IEC 61094
Sound field	Pressure field
Polarization	Classical
Sensitivity	0.56 mV/Pa, 0.8 mV/Pa
Lower frequency	6.5 Hz
Higher frequency	140 kHz
Lower dynamic range	52.2 dB
Higher dynamic range	168 dB
Diameter	1/8 inch
Venting	Side
Minimum Temperature	-30 °C
Maximum Temperature	100 °C
Minimum Temperature	-22 °F
Maximum Temperature	212 °F
Output signal (connectivity)	Passive

List of accessories available for all variants of this family

Product Code	Description
-2669-B--	1/2" classic MicPreamp,tapered, B&K Con.
-2669-C--	1/2" classic MicPreamp,cylindr., LEMO 1B
-2669-L--	1/2" classic MicPreamp,tapered,7-p LEMO
-4228---	Pistonphone calibrator, 250Hz, 124dB,Cla
-4231---	0,01d Calibrator, Class1, 94&114dB, 1kHz
DP-0774---	Adaptor 1/8" Mic for 4228/4231
UA-0033---	Electrostatic Actuator 1/2" for HBK Mic
UA-0036---	Adaptor 1/8" Mic to 1/2" Preamp
UA-0160---	Adaptor 1/8" Mic to 1/4" Preamp
UA-0355---	Nose Cone for 1/8" Mic

THIS MICROPHONE IS A FACTORY-ASSEMBLED COMBINATION OF:

The unit is assembled in a clean-room environment and sealed together, after which it is assigned one single type number and one single serial number. This means that the combined unit has better precision and long-time stability, and is handled as one complete unit.

The unit also contains TEDS, which means that information about the serial number, type and sensitivity is stored within it.

THE BENEFITS OF USING A MICRPHONE-PREAMPLIFIER NCOMBINATION ARE:

Better stability and precision. Because the unit is assembled in clean-room facilities, there is no contamination.
Ease of use. Your analyzer front-end and software will automatically detect the type number, serial number and sensitivity because of the built-in TEDS technology. There is no need to enter this manually for every channel.
Calibration integration. The TEDS technology means the microphone is automatically detected and identified by your data acquisition software, allowing it to be easily integrated with your calibration database.
Fewer errors. As your data acquisition software automatically knows the microphone type, serial number and sensitivity, manual inputs are greatly reduced – reducing human errors.

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