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Type 4954-B

FAMILY 4954

1/4-INCH FREE-FIELD MICROPHONE, PREPOLARIZED 

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

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FAMILY 4954

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Type 4954 is a 1/4-inch Prepolarized Free-field microphone and is specially designed for high-level and high-frequency measurements.

The use of a laser welded stainless steel diaphragm and a stainless steel protection grid, make this microphone capable of withstanding rough environments.

  • High-frequency measurements
  • High-level measurements
  • Cost-effective measurements
Code Standard Polarization Lower frequency [Hz] Higher frequency [Hz] Lower dynamic range [dB] Higher dynamic range [dB] Maximum Temperature [°C] Maximum Temperature [°F]
-4954-A-011- IEC 61094 Classical 3 Hz 80 kHz 34 dB 164 dB 80 °C 176 °F
-4954-A-023- IEC 61094 Classical 3 Hz 80 kHz 34 dB 164 dB 80 °C 176 °F
-4954-B-- IEC 61094 CCLD 16 Hz 80 kHz 40 dB 159 dB 80 °C 176 °F
-4954-W-004- IEC 61672 Classical 50 Hz 22 kHz 40 dB 159 dB 100 °C 212 °F

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Description

Type

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1/4-inch Prepolarized Free-field TEDS Microphone Types 4954-A and 4954-B

Technical Document English
FAMILY 4954
Standard IEC 61094, IEC 61672
Sound field Free field
Polarization CCLD, Classical
Sensitivity [mV/Pa] 2.8 mV/Pa
Lower frequency [Hz] 16 Hz, 50 Hz, 3 Hz
Higher frequency [Hz] 80 kHz, 22 kHz
Lower dynamic range [dB] 40 dB, 34 dB
Higher dynamic range [dB] 159 dB, 164 dB
Diameter 1/4 inch
Venting Side
Minimum Temperature [°C] -20 °C
Maximum Temperature [°C] 80 °C, 100 °C
Minimum Temperature [°F] -4 °F
Maximum Temperature [°F] 176 °F, 212 °F
Output signal (connectivity) Passive

This microphone consists of Microphone Type 4954 laser welded to a ¼" microphone preamplifier. 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 transducers can be connected to any CCLD input and support IEEE P1451.4 V0.9 TEDS (Transducer Electronic Data Sheet). The unit also contains TEDS, which means that information about the serial number, type and sensitivity is stored within it.

BENEFITS OF USING A MICROPHONE-PREAMPLIFIER SET:

  • 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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