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 4938 1/4"

4938 1/4"

4938 - ¼” pressure-field microphone, 4 Hz to 70 kHz, 200V polarization

Overview:
Pressure-field ¼" Microphone Type 4938 is designed for high-level and high-frequency measurements. B
By using new materials and a new way of mounting the diaphragm, the microphone is geared to withstand rough handling and high temperatures of up to 300°C (572°F).

Uses
• High temperature measurements
• High level measurements
• High frequency measurements
• Flush mounting

 

Features
• Sensitivity: 1.6 mV/Pa
• Frequency: 4 – 70 000 Hz
• Dynamic range: 30 – 172 dB
• Temperature: – 40 to 300°C (–40 to 572°F)
• Polarization: 200 V External

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" 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.
 

4938 1/4"

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