1" Free-field Microphone, Ext. Polarized
Free-field microphone for low-level, laboratory, and sound pressure measurements (IEC 61672 Class 1) over a frequency range of 2.6 Hz To 18 kHz.
TYPE 4145
Type 4145 is a 1-inch free-field microphone designed for low-level and laboratory free-field measurements. The specifications of Type 4145 also make it suitable for sound pressure measurements in accordance with IEC 61672 Class 1.
When fitted with Random Incidence Corrector UA-0055, Type 4145 can also be used for random-incidence measurements.
The sensitivity of Type 4145 can be calibrated at 250 Hz using Pistonphone Type 4228, or at 1 kHz using Sound Level Calibrator Type 4231.
The pressure-field response can be measured using Electrostatic Actuator UA 0023.
File |
Description |
Type |
Languages |
---|---|---|---|
1-inch Free-field Microphone - Type 4145 | Technical Document | English |
Standard | IEC 61094 |
Sound field | Free field |
Polarization voltage | 200V |
Sensitivity [mV/Pa] | 50 mV/Pa |
Lower limiting frequency | 2.6 Hz |
Higher limiting frequency | 18 kHz |
Inherent noise | 10 dB(A) |
Upper limiting of dynamic range | 146 dB |
Diameter | 1 inch |
Venting | Rear |
Minimum Temperature [°C] | -30 °C |
Maximum Temperature [°C] | 100 °C |
Minimum Temperature [°F] | -22 °F |
Maximum Temperature [°F] | 212 °F |
Product Code | Description |
---|---|
|
Windscreen for 1"Mic, 90mm Diameter |
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.