... 1 and IEC 61260 class 13Microphone1/2" Prepolarized Condenser Mic. Model AWA14423 (sensitivity: 50 mV/Pa)4PreamplifierAWA146015Frequency Range10 Hz ~ 20 ... : ≤0.1 dB.7Self-generated Noise<18 dB(A), 23 dB(C), 28 dB(Z)8Meas. upper Range140 dB9Peak C ... Ln, Ldn22Real-time spectrum analysisFulfils standards: IEC 61260 Class 1Filter type: Digital band-pass filterMeasuring Parameters: Lfmi, Lfmeq,1s, Lfmeq,T ...