4938 - 1/4 inch pressure filed Microphone

4938 - 1/4 inch pressure filed Microphone

TYPE 4938

<强>1/4英寸压力场麦克风，外部极化

压力场麦克风，可在 4 Hz 至 70 kHz 的频率范围内进行高级别和高频测量。

TYPE 4938

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压力场¼英寸麦克风TYPE 4938专为高级别和高频测量而设计。麦克风风可承受粗糙的操作和高达300°C(572°F)的高温。

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高温测量

高级别测量

高频测量

齐平安装

1/4'' Pressure-field Microphone Type 4938	Data Sheets	English
TEDS Microphones	Data Sheets	English
TEDS Microphones	Data Sheets	Japanese

TYPE 4938
Standard	IEC 61094
Sound field	Pressure field
Polarization voltage	200V
Sensitivity	1.6 mV/Pa
Lower limiting frequency	4 Hz
Higher limiting frequency	70 kHz
Inherent noise	30 dB(A)
Upper limiting of dynamic range	172 dB
Diameter	1/4 inch
Venting	Side
Minimum Temperature	-40 °C
Maximum Temperature	300 °C
Minimum Temperature	-40 °F
Maximum Temperature	572 °F

DESIGN AND ROBUSTNESS

The shape of the microphone front ensures excellent microphone performance when flush-mounted and the laser-welded diaphragm on the microphone housing ensures that the sensitivity is resistant to rough handling during flush mounting. The robustness of the microphone makes it capable of withstanding the IEC 68-2-32 1 metre drop.

CALIBRATION

The sensitivity can be calibrated at 250 Hz using Pistonphone Type 4228 with ¼-inch Adaptor DP 0775. The pressure-field response can be measured using Actuator UA 0033 with Adaptor DB 0264. The pressure-field response is equal to the actuator response.

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