MP205 is 1/2" prepolarized free-field measurement microphone. It is ideal to be used in IEC61672 Class 2 Sound Level Meters and other noise measurements where Class 2 accuracy is required.
The design of the MP205 is based on the technology and structure of the MP201. The microphone diaphragm is made from nickel using BSWA diaphragm coating technology with housing made stainless steel. It is high quality Class 2 microphone. The temperature, pressure, and humidity coefficients are better than IEC 61672 Class 2 requirements.
The microphone protection grid is redesigned to distinguish MP201 and MP205. The free-field correction and polar pattern of MP205 were measured in the anechoic chamber. Each MP205 is individually calibrated using the electrostatic actuator and piston phone. All microphones are environmentally aged for long term stability.
Specifications
| Diameter |
1/2 inch |
| Response |
Free Field |
| Open-Circuit Sensitivity |
-28.0dB±3.0dB (40 mV/Pa) |
| Frequency Response |
20 - 10 kHz |
| Polarization Voltage |
0 V |
| Dynamic Range (3% Distortion Limit) |
> 146dB |
| Cartridge Thermal Noise |
< 24 dB (A) |
| Capacitance (Typical) |
13 pF |
| Pressure Equalization Vent |
Rear Vented |
| Operating Temperature |
-20? ~ 80? |
| Operating Humidity |
0 to 98% RH |
| Equivalent Air Volume |
240 mm3 at 250 Hz |
| Temperature Coefficient (0 to 40?) |
< ± 0.6 dB at 250Hz, at reference temperature 23 ? |
| Humidity Coefficient20% - 90% RH |
< ± 0.6 dB at 250Hz at temperature 40?, and reference 50% RH |
| Pressure Coefficient (250 Hz) |
85 kPa - 108 kPa ; Sound Pressure Level change < ± 0.6 dB at 250 Hz at reference pressure 101 kPa. From 65 kPa - 85 kPa: Sound Pressure Level change < ± 1.2 dB at 250 Hz |
| Dimensions |
IEC 1094-4 Type WS 2 |
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