MMA275 1/2 inch pressure field microphone Introduction: MMA275 1/2 inch pressure field microphone, suitable for pressure field environments such as chambers, near hard reflective surfaces, or installed flush with hard surfaces, does not require external polarization voltage, and is equipped with an inseparable integrated ICCP powered preamplifier (optional TEDS). MMA275 uses pre equalization method, with a frequency range of 50 Hz~10 kHz (± 3 dB), and can measure sound pressure levels up to 132 dB. MMA275 is suitable for applications that require a large number of microphones and high individual cost, such as near-field acoustic holography (NAH), beamforming, and other array applications. Application scope: 1. Low cost microphone 2. Array applications such as near-field acoustic holography (NAH) and beamforming 3. Quality inspection of production line products Technical parameters: Sound field type: pressure field Diameter: 1/2“ Sensitivity @ 250 Hz (mV/Pa) (± 2 dB): 40 (-28 dB re 1V/Pa) Frequency response (Hz): 100~5 k (± 2 dB), 50~10 k (± 3 dB) Dynamic range (dBA~dB): 32~132 Self generated noise (dBA): 32 Maximum sound pressure level (dB): 132 (3% distortion) Pressure equalization method: front equalization Pre amplifier: inseparable and integrated Maximum output voltage (Vp) 1: ± 8 Output impedance (Ω):<30 Power supply mode: ICCP (2mA~20mA, 4mA typical) Temperature range for use (° C): -10~50 Humidity range (% RH): 10~90 Size (mm): Ø 13.2 × 50.6 Output interface: coaxial Lemo connector Weight (g): 23 TEDS: Optional, compliant with IEEE 1451.4 (default v0.9, optional v1.0)
Introduction: MMA275 1/2 inch pressure field microphone, suitable for pressure field environments such as chambers, near hard reflective surfaces, or installed flush with hard surfaces, does not require external polarization voltage, and is equipped with an inseparable integrated ICCP powered preamplifier (optional TEDS). MMA275 uses pre equalization method, with a frequency range of 50 Hz~10 kHz (± 3 dB), and can measure sound pressure levels up to 132 dB. MMA275 is suitable for applications that require a large number of microphones and high individual cost, such as near-field acoustic holography (NAH), beamforming, and other array applications. Application scope: 1. Low cost microphone 2. Array applications such as near-field acoustic holography (NAH) and beamforming 3. Quality inspection of production line products
