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Microphone IEC 61672 Class 1
MP201 is 1/2" prepolarized freefield measurement microphone. It is ideal microphone to be used in IEC61672 Class 1 Sound Level Meters and other noise measurements where the Class 1 accuracy is required.
MP201 microphone diaphragm is made from nickel using BSWA diaphragm coating technology. The microphone housing is made from nickel alloy to ensure the smallest temperature, pressure, and humidity coefficients.
MP201 uses 40% of the frequency response tolerances allowed by IEC61672 Class 1 in production quality control. Each MP201 microphone is supplied with its individual calibration for frequency response and sensitivity.
Specifications:
| Diameter | 1/2 inch |
| Response | Free Field |
| Open-Circuit Sensitivity | -26 ± 2 dB (50mV/Pa) |
| Frequency Response | 20 - 20 kHz |
| Polarization Voltage | 0 V |
| Dynamic Range (3% Distortion Limit) | > 146 dB |
| Cartridge Thermal Noise | < 16.0 dBA |
| Capacitance (Typical) | 16.0 pF |
| Pressure Equalization Vent | Rear Vented |
| Operating Temperature | -30 to 80°C |
| Operating Humidity | 0 to 98% RH |
| Equivalent Air Volume | 250 mm3 at 250 Hz |
| Temperature Coefficient (-10 to 50°C) | - 0.005 dB/°C |
| Humidity Coefficient | -0.003 dB/%RH |
| Pressure Coefficient (250 Hz) | -0.004 dB/kPa |
| Dimensions | IEC 1094-4 Type WS 2 |
