<强>½英寸自由场麦克风，预极化
自由场麦克风，用于传输噪声测量、建筑声学和电声测量，频率范围为 8 Hz 到 12.5 kHz。
TYPE 4188
4188型专为需要中等灵敏度的经济型麦克风的自由场测量而设计。TYPE 4188 具有预极化特性，可与 CCLD 和经典前置放大器一起使用。
| Code | Polarization | 下限频率 | Lower dynamic range | Higher dynamic range |
|---|---|---|---|---|
| -4188-A-021- | CCLD, CCLD | 20 Hz | 19 dB | 138 dB |
| -4188-C-001- | Classical, Classical | 8 Hz | 15.8 dB | 146 dB |
| -4188-L-001- | Classical, Classical | 8 Hz | 15.8 dB | 146 dB |
| TEDS Microphones | Data Sheets | English |
| TEDS Microphones | Data Sheets | Japanese |
| Standard | ANSI S1.4 |
| Sound field | Free field |
| Polarization | Classical, CCLD |
| Sensitivity | 31.6 mV/Pa |
| Lower frequency | 8 Hz, 20 Hz |
| Higher frequency | 12.5 kHz |
| Lower dynamic range | 15.8 dB, 19 dB |
| Higher dynamic range | 146 dB, 138 dB |
| Diameter | 1/2 inch |
| Venting | Rear |
| Minimum Temperature | -30 °C |
| Maximum Temperature | 100 °C |
| Minimum Temperature | -22 °F |
| Maximum Temperature | 212 °F |
| Output signal (connectivity) | Passive |
Type 4188-A-021 is designed for free-field measurements where an economy microphone with medium sensitivity is required.
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.
