MPA426 1/4 inch free field microphone Introduction: MPA426 is a 1/4 inch free field microphone suitable for measurement in non reflective free field and semi free field environments. It uses pre polarization without the need for external polarization voltage and is equipped with an inseparable integrated ICCP powered preamplifier. The MPA426 uses a pre equalization method with a frequency range of 20 Hz to 20 kHz. Compared to the MPA416, it has lower sensitivity and cost, making it suitable for applications such as acoustic arrays, electro acoustics, and conventional acoustic measurements. Application scope: Low cost microphones; Near field acoustic holography (NAH); Array applications such as beamforming; Quality inspection of production line products; Technical parameters: Sound Field Type: Free Field Diameter: 1/4“ Level (IEC 61672): Level 1 Sensitivity @ 250 Hz (mV/Pa) (± 3 dB): 35 (-29 dB re 1V/Pa) Polarization voltage: 0 V (pre polarized) Frequency response (Hz): 20~20 k (± 3 dB) Dynamic range (dBA~dB): 32~130 Self generated noise (dBA): 32 Maximum sound pressure level (dB): 130 (3% distortion) Phase matching 1:100 Hz~1 kHz: ± 3 ° 3 kHz ~ 5 kHz: ±5° 5 kHz ~ 10 kHz: ±10° Pressure equalization method: front equalization Pre amplifier: inseparable and integrated Maximum output voltage (Vpeak) 2: ± 3.16 Output impedance (Ω):<110 Power supply mode: ICCP (2mA~20mA, 4mA typical) Temperature range for use (° C): -10~50 Humidity range (% RH): 0~90 Size (mm): Ø 7 × 61 Output interface: SMB Weight (g): 8.6
Introduction: MPA426 is a 1/4 inch free field microphone suitable for measurement in non reflective free field and semi free field environments. It uses pre polarization without the need for external polarization voltage and is equipped with an inseparable integrated ICCP powered preamplifier. The MPA426 uses a pre equalization method with a frequency range of 20 Hz to 20 kHz. Compared to the MPA416, it has lower sensitivity and cost, making it suitable for applications such as acoustic arrays, electro acoustics, and conventional acoustic measurements. Application scope: Low cost microphones; Near field acoustic holography (NAH); Array applications such as beamforming; Quality inspection of production line products;
