... 40 dB.Range Error: ≤0.1 dB.7Self-generated Noise<18 dB(A), 23 dB(C), 28 dB(Z)8Meas. upper ... Ln, Ldn22Real-time spectrum analysisFulfils standards: IEC 61260 Class 1Filter type: Digital band-pass filterMeasuring Parameters: Lfmi, Lfmeq,1s, Lfmeq,T ... 3 kHz, 1.5 kHz.Upper Limit of Analysis Frequency: 18.75 kHz, 9375 Hz, 4687 Hz, 2344 Hz, 1172 Hz ... kPa ~ 108 kPa AWA 6291 Real Time Signal Analyzer Type 1