<强>½英寸漫射麦克风，预偏振
专为6 Hz至16 kHz的Random入射(漫射)测量而设计的漫射麦克风，提供符合ANSI标准的噪声测量。
TYPE 4942
TYPE 4942预偏振漫射场 ½ 麦克风针对一般的Random入射测量和符合 ANSI 标准的标准化噪声测量进行了优化。并且被预极化，它可以连接到CCLD输入调节。
| Product Data: ½'' Prepolarized Diffuse-field Microphone Type 4942 | Data Sheets | English |
| Standard | ANSI S1.4 |
| Sound field | Diffuse field |
| Polarization voltage | 0V |
| Sensitivity | 50 mV/Pa |
| Lower limiting frequency | 4 Hz |
| Higher limiting frequency | 16 kHz |
| Inherent noise | 14.6 dB(A) |
| Upper limiting of dynamic range | 146 dB |
| Diameter | 1/2 inch |
| Venting | Rear |
| Minimum Temperature | -40 °C |
| Maximum Temperature | 150 °C |
| Minimum Temperature | -40 °F |
| Maximum Temperature | 302 °F |
A diffuse-field microphone, also called a random-incidence microphone, is designed to have a flat response when signals arrive simultaneously from all directions. They should therefore not only be used for measurement in reverberation chambers, but in all situations where the sound field is diffuse, or where several sources contribute to the sound pressure at the measurement position. Practical examples are indoor situations, where the sound is reflected by walls, ceilings, and objects in the room, or measurements inside a car.
The microphone is capable of withstanding the IEC 68-2-32 1 metre drop test.
The sensitivity can be calibrated at 250 Hz by using Pistonphone Type 4228 with ½-inch Adaptor DP 0776. The actuator response can be measured using Actuator UA 0033. The random-incidence response can be obtained by adding the type-specific, random-incidence correction to the actuator response. Please note that this microphone is not suitable for pressure-field measurements.
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.
