TYPE 4938

1/4" DRUCKFELDMIKROFON, EXTERN POLARISIERT

Druckfeldmikrofon für Messungen mit hohem Pegel und hoher Frequenz in einem Frequenzbereich von 4 Hz bis 70 kHz.

TYPE 4938

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Das 1/4" Druckfeld-Mikrofon Typ 4938 ist für Messungen mit hohem Pegel und hoher Frequenz konzipiert. Das Mikrofon ist so konzipiert, dass es rauer Handhabung und hohen Temperaturen von bis zu 300 °C (572 °F) standhält.

Messungen bei hohen Temperaturen
Messungen hoher Pegel
Hochfrequenzmessungen
Bündige Montage

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Code	Empfindlichkeit	Lower dynamic range	Minimaltemperatur	Maximaltemperatur	Minimaltemperatur	Maximaltemperatur
-4938-A-011-	1.4 mV/Pa	42 dB	-20 °C	80 °C	-4 °F	176 °F
-4938-D-011-	1.4 mV/Pa	42 dB	-20 °C	80 °C	-4 °F	176 °F
-4938-L-002-	1.4 mV/Pa	42 dB	-20 °C	80 °C	-4 °F	176 °F
-4938-W-001-	1.6 mV/Pa	30 dB	-40 °C	300 °C	-40 °F	572 °F

FAMILY 4938
Standard	IEC 61094
Sound field	Pressure field
Polarization	Classical
Sensitivity	1.4 mV/Pa, 1.6 mV/Pa
Lower frequency	4 Hz
Higher frequency	70 kHz
Lower dynamic range	42 dB, 30 dB
Higher dynamic range	172 dB
Diameter	1/4 inch
Venting	Side
Minimum Temperature	-20 °C, -40 °C
Maximum Temperature	80 °C, 300 °C
Minimum Temperature	-4 °F, -40 °F
Maximum Temperature	176 °F, 572 °F
Output signal (connectivity)	Passive

List of accessories available for all variants of this family

Product Code	Beschreibung
-2670-W-012-	Short 2670 Pre-Amplifier, / 10,0 m A
-4228---	Pistonphon Klasse 1, 124 dB, 250 Hz
-4231---	Akustischer Kalibrator der Klasse 1 - 94
DB-0264---	"Adapter, 1/4"" Mikrofon auf 1/2"" Mikro
DP-0775---	"1/4"" Kalibrieradapter für Akustischen
UA-0033---	"Elektrostatisches Eichgitter für 1/2""
UA-0035---	"1/4"" - 1/2"" Mikrofonadapter"
UA-0122---	"1/4"" - 1/2"" Winkel-Adaptersatz"
UA-0123---	"1/4"" - 1/2"" Adaptersatz"
WA-0371---	1/4" Mikrofonadapter auf 1/2" Vorverstär
UA-0033-W-001-	Electrostatic Actuators for Type 4180
WQ-1099---	"Windschirm für 1/4"" Mikrofone, kugelfö
WQ-1133---	"Windschirm für 1/4"" Mikrofone, ellipso
UA-0385---	"Nasenkonus für 1/4"" Mikrofon"
EU-4000---	"1/4"" Winkelstück"

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THIS MICROPHONE SET IS A 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 MICROPHONE-PREAMPLIFIER COMBINATION 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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