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Microphone
Microphone type: CRY321
Open circuit Sensitivity: 25mV/Pa(-32dB re 1 V/Pa)±2dB
Frequency range: 20Hz~12.5kHz(±2dB)
Self-generated noise level: 22dBA
Technical Specification
Linear Operating Range: 30dBA ~ 135 dBA
Frequency range: 20Hz~12.5kHz(±2dB)
Internal noise: ≤25dBA
Applicable standards: IEC61672-1: 2013 Class 2
Weighting filters: Frequency weighting: A, C
Time constants: Time Weighting: S, F
Measuring Parameter: Lp, Lmax
Measurement function: SLM
Communication Interfaces: AC/DC
Calibration
Reference Level: 94dB@1kHz
Calibration: Sound Calibrator Class 2 or Class 1
Environment: Temperature 23°C，Pressure 101.325kPa，Humility 50% RH
Power Supply
Battery: 4xAA battery
External Power Supply: 5V USB Type C
Ambient conditions for operation
Operating temperature range: -20~+60℃
Humidity range: ≤90% RH
Physical Weight: 300g (With battery)
Size: L*W*H=249x76x30.5mm
Display: 128*64，Dot Matrix LCD
Operation: Button
