MP251 1/2 inch pressure field microphone Introduction: MP251 1/2 inch pressure field microphone, suitable for pressure field environments such as chambers, near hard reflective surfaces, or installed flush with hard surfaces. It uses pre polarization without the need for external polarization voltage and is suitable for ICCP powered MA231 preamplifiers (optional TEDS). MP251 uses a side equalization method with a frequency range of 3.15 Hz to 20 kHz, and can measure sound pressure levels up to 160 dB. MP251 adopts a redesigned microphone configuration, with nickel metal diaphragm and high nickel alloy shell having the same coefficient of expansion, which can effectively improve the temperature stability of the microphone and have excellent corrosion resistance. Technical parameters: Sound field type: pressure field Diameter: 1/2“ Open circuit sensitivity @ 250 Hz (mV/Pa) (± 2 dB): 12.5 (-38 dB re 1V/Pa) Polarization voltage: 0V (pre polarized) Frequency response (Hz): 5~8 k (± 1 dB), 3.15~20k (± 2 dB) Dynamic range (dBA~dB): 22~160 Microphone thermal noise (dBA): 22 Maximum sound pressure level (dB) (3% distortion) 1:160 Capacitor (pF): 10 Equivalent front cavity volume @ 250 Hz (mm3): 9 Pressure equalization method: side 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 × 13.7 Excluding protective cover Ø 12.7 × 12.6 Connection thread: 11.7mm-60UNS Weight (g): 6.1 Applicable preamplifier: MA231 TEDS: Optional, compliant with IEEE 1451.4 (default v0.9, optional v1.0)
Introduction: MP251 1/2 inch pressure field microphone, suitable for pressure field environments such as chambers, near hard reflective surfaces, or installed flush with hard surfaces. It uses pre polarization without the need for external polarization voltage and is suitable for ICCP powered MA231 preamplifiers (optional TEDS). MP251 uses a side equalization method with a frequency range of 3.15 Hz to 20 kHz, and can measure sound pressure levels up to 160 dB. MP251 adopts a redesigned microphone configuration, with nickel metal diaphragm and high nickel alloy shell having the same coefficient of expansion, which can effectively improve the temperature stability of the microphone and have excellent corrosion resistance.
