<强>1/2"麦克风风， 预极化
自由场麦克风设计用于在6.5 Hz到16 kHz的频率范围内进行精确的声音测量(IEC 61672 Class 1和ANSI S 1.4 Type 1)。
TYPE 4950
此预极化自由场½英寸麦克风专为用于符合IEC 61672 Class 1和ANSI S 1.4 Type 1的准确可靠声音测量的设备而设计。
| ½-inch Prepolarized Free-field Microphone Type 4950 | Data Sheets | English |
| Standard | IEC 61672 |
| Sound field | Free field |
| Polarization voltage | 0V |
| Sensitivity | 50 mV/Pa |
| Lower limiting frequency | 6.5 Hz |
| Higher limiting frequency | 16 kHz |
| Inherent noise | 15 dB(A) |
| Upper limiting of dynamic range | 142 dB |
| Diameter | 1/2 inch |
| Venting | Rear |
| Minimum Temperature | -30 °C |
| Maximum Temperature | 100 °C |
| Minimum Temperature | -22 °F |
| Maximum Temperature | 212 °F |
½-inch Free-field Microphone Type 4950 is a prepolarized condenser microphone, designed for accurate and reliable sound measurements as required for sound level meters in accordance with IEC 61672 Class 1 and ANSI S 1.4 Type 1.
The use of a stainless-steel, press-fit mounted diaphragm guarantees both robustness and corrosion resistance. The microphone is fitted with a removable protection grid. It does not need an external polarization voltage, thus eliminating the need for cumbersome high-voltage DC supplies and at the same time enabling the use of inexpensive 2-wire system (CCLD) input.
The microphone is rear-vented in order to balance out the static pressure; the venting also determines the lower limiting frequency. Type 4950 comes with a calibration chart showing typical frequency response and individual sensitivity value.
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.
