... 20 kHz6Range Gain-10 dB, 0 dB, 10 dB, 20 dB, 30 dB, 40 dB.Range Error: ≤0.1 dB.7Self-generated Noise<18 dB(A), 23 dB(C), 28 dB ... noise (S6291 -00303)Filters Center Frequency: 10 Hz~20 kHz25FFT analysis functionFFT analysis software for noise (S6291 - ... Range: 0.20s to 20.00 s5. Wave record time: 10 s or 20 s6. Bandwidth of digital ... , 1 min, 5 min, 10 min, 15 min, 20 min, 30 min, 1h, 4h, 8h, 24h or ...