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4939 B 002
4939 C 002 Connector

TYPE 4939

1/4 "フリーフィールドマイクロスコープ、EXT.POLARIZED

4Hz～70kHzの周波数応答を持つ、高レベルおよび高周波測定用に設計された圧力屋外TEDSマイクロホン。
TYPE 4939

TYPE 4939

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ステンレス製の振動板と保護グリッドを採用した4939型マイクロホンは、過酷な環境にも耐えることができ、最高150℃までの高温測定にも対応します。
外部偏極型マイクは、測定感度を大きく変化させることなく、より高い温度で使用することができます。

  • 高レベルの測定
  • 。
  • 高周波測定
  • モデルの仕事
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Document タイプ 言語
TEDS Microphones データシート English
TEDS Microphones データシート Japanese
FAMILY 4939
プロパティ 値
Standard IEC 61094
Sound field Free field
Polarization Classical
Sensitivity 3.5 mV/Pa, 4 mV/Pa
Lower frequency 4 Hz
Higher frequency 100 kHz
Lower dynamic range 35 dB
Higher dynamic range 164 dB
Diameter 1/4 inch
Venting Side
Minimum Temperature -20 °C
Maximum Temperature 80 °C
Minimum Temperature -4 °F
Maximum Temperature 176 °F
Output signal (connectivity) Passive

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.