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4939 B 002
4939 C 002 Connector

4939 系列

1/4"自由场传声器，外部极化

专为在 4 Hz 至 100 kHz 频率范围内进行高声级和高频测量设计的自由场传声器。

4939 系列

4939 系列

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使用不锈钢振膜和保护格栅4939型传声器专为承受恶劣环境而设计，可用于高达150°C（302°F）的高温测量。

该传声器需要外部极化电压，因此必须与经典的前置放大器一起使用。外部极化传声器可以在较高温度下使用，而不会对测量灵敏度产生严重影响。

  • 高声级测量
  • 高频测量
  • 模型工作
Language keyboard_arrow_down
Document Type Language
TEDS Microphones 數據表 English
TEDS Microphones 數據表 Japanese
FAMILY 4939
Property Value
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.