<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
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。
| Code | 灵敏度 | Lower dynamic range | 最低温度 | 最高温度 | 最低温度 | 最高温度 |
|---|---|---|---|---|---|---|
| -4938-A-011- | 1.4 mV/Pa | 42 dB | -20 °C | 80 °C | -4 °F | 176 °F |
| -4938-D-011- | 1.4 mV/Pa | 42 dB | -20 °C | 80 °C | -4 °F | 176 °F |
| -4938-L-002- | 1.4 mV/Pa | 42 dB | -20 °C | 80 °C | -4 °F | 176 °F |
| -4938-W-001- | 1.6 mV/Pa | 30 dB | -40 °C | 300 °C | -40 °F | 572 °F |
| 1/4'' Pressure-field Microphone Type 4938 | Data Sheets | English |
| TEDS Microphones | Data Sheets | English |
| TEDS Microphones | Data Sheets | Japanese |
| Standard | IEC 61094 |
| Sound field | Pressure field |
| Polarization | Classical |
| Sensitivity | 1.4 mV/Pa, 1.6 mV/Pa |
| Lower frequency | 4 Hz |
| Higher frequency | 70 kHz |
| Lower dynamic range | 42 dB, 30 dB |
| Higher dynamic range | 172 dB |
| Diameter | 1/4 inch |
| Venting | Side |
| Minimum Temperature | -20 °C, -40 °C |
| Maximum Temperature | 80 °C, 300 °C |
| Minimum Temperature | -4 °F, -40 °F |
| Maximum Temperature | 176 °F, 572 °F |
| Output signal (connectivity) | Passive |
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.
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.
