MP281 1/2 inch diffuse field microphone Introduction: MP281 is a 1/2-inch diffuse field microphone suitable for measurement in diffuse field environments such as cabins and vehicle interiors with strong reflection. It uses pre polarization without the need for external polarization voltage and is suitable for ICCP powered MA231 preamplifiers (optional TEDS). MP281 uses post equalization method, with a frequency range of 6 Hz~12.5 kHz, and can measure sound pressure levels up to 146 dB. MP281 is suitable for high-precision general acoustic measurement and can be equipped with a preamplifier with TEDS function to support direct reading of microphone information by data acquisition devices, including microphone model, serial number, sensitivity, etc. At present, Beijing's prestigious TEDS microphones support the IEEE 1451.4 standard, which defaults to v0.9 version to be compatible with more data acquisition devices. According to user requirements, v1.0 version can also be selected. For detailed information about TEDS, please refer to "Technical Summary 5 TEDS Sensor Electronic Data Sheet". Technical parameters: Sound Field Type: Diffuse Field Diameter: 1/2“ Open circuit sensitivity @ 250 Hz (mV/Pa) (± 2 dB): 40 (-28 dB re 1V/Pa) Polarization voltage: 0V (pre polarized) Frequency response (Hz) (± 2 dB): 6~12.5k Dynamic range (dBA~dB) 1:17~146 Microphone thermal noise (dBA): 17 Maximum sound pressure level (dB) (3% distortion) 1:146 Capacitor (pF): 16 Equivalent front cavity volume @ 250 Hz (mm3): 46 Pressure equalization method: rear equalization Temperature range for use (° C): -30~80 Humidity range (% RH): 0~98 Temperature coefficient (250 Hz) (dB/° C): -0.02 Pressure coefficient (250 Hz) (dB/kPa): -0.01 Humidity impact (dB):<0.1 Compliant with standard: IEC 61094-4 Type WS2P Size (mm): including protective cover Ø 13.2 × 17.2 Excluding protective cover Ø 12.7 × 16.1 Connection thread: 11.7 mm -60 UNS Weight (g): 8.8 Applicable preamplifier: MA231 (optional TEDS, IEEE 1451.4 v0.9/v1.0)
Introduction: MP281 is a 1/2-inch diffuse field microphone suitable for measurement in diffuse field environments such as cabins and vehicle interiors with strong reflection. It uses pre polarization without the need for external polarization voltage and is suitable for ICCP powered MA231 preamplifiers (optional TEDS). MP281 uses post equalization method, with a frequency range of 6 Hz~12.5 kHz, and can measure sound pressure levels up to 146 dB. MP281 is suitable for high-precision general acoustic measurement and can be equipped with a preamplifier with TEDS function to support direct reading of microphone information by data acquisition devices, including microphone model, serial number, sensitivity, etc. At present, Beijing's prestigious TEDS microphones support the IEEE 1451.4 standard, which defaults to v0.9 version to be compatible with more data acquisition devices. According to user requirements, v1.0 version can also be selected. For detailed information about TEDS, please refer to "Technical Summary 5 TEDS Sensor Electronic Data Sheet".
