1/4-INCH PRESSURE-FIELD MICROPHONE, EXTERNALLY POLARIZED
Pressure-field microphone for high-level and high-frequency measurements over a frequency range of 4 Hz to 70 kHz.
TYPE 4938
Pressure-field ¼-inch Microphone Type 4938 is designed for high-level and high-frequency measurements. The microphone is geared to withstand rough handling and high temperatures of up to 300°C (572°F).
| 1/4'' Pressure-field Microphone Type 4938 | Data Sheets | English |
| TEDS Microphones | Data Sheets | English |
| 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 |
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.
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.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, MicroStrain and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
