MP201 microphone is the best choice for use in IEC61672 Class 1 Sound Level Meters and other noise measurements requiring Class 1 accuracy. The microphone housing and diaphragm are made from the same nickel alloy to ensure the smallest temperature coefficients.
Production quality control for the MP201 uses only 40% of the frequency response tolerances allowed by IEC61672 Class 1 microphones.
MP231 microphone uses stainless steel as protection grid, which makes the microphone stronger and firmer. The MP231 conforms to IEC61672 Class 1 standard with a sensitivity of 40mv/Pa. The MP231 is perfect for its long-term stability.
|FREE FIELD MICROPHONE MP201/MP231|
|Open-Circuit Sensitivity||-26 dB±2 dB (50 mV/Pa)||-28 dB±3 dB (40 mV/Pa)|
|Capacitance (Typical)||16 pF||16 pF|
|Polarization Voltage||0 V|
|Frequency Response||6.3 Hz ~ 20 kHz|
|Dynamic Range (3% Distortion Limit)||> 146 dB|
|Cartridge Thermal Noise||< 16 dB (A)|
|Pressure Equalization Vent||Rear Vented|
|Operating Temperature||-30°C ~ 80°C|
|Operating Humidity||0 ~ 98% RH|
|Equivalent Air Volume||250 mm3 at 250 Hz|
|Temperature Coefficient (-10°C ~ 50°C)||– 0.005 dB/°C|
|Humidity Coefficient||– 0.003 dB/%RH|
|Pressure Coefficient (250 Hz)||– 0.004 dB/kPa|
|Dimensions||IEC 61094-4 Type WS|