This unit was designed according to following standards: - International electrician committee standard: IEC PUB 651 TYPE2 - US national standard: ANSI S1.4 TYPE2
Measuring range: 30~130 dBA
Accuracy: 1.5 dB
Digit & Resolution: 4 digits & 0.1 dB
Frequency response: 31.5Hz ~8.5KHz
Frequency weighting characteristic: A
Sampling rate: 2 times/second
Microphone: 1/2 inch polarization capacitance microphone
