... 160 graphic LCD, with EL back-lit16Display Refresh1 Hz for value; 10 Hz for graph17Main Parameters of Integrating MeasurementLxyp, Lxyi, Lxeq ... software for noise (S6291 -00303)Filters Center Frequency: 10 Hz~20 kHz25FFT analysis functionFFT analysis software for noise (S6291 - ... 9375 Hz, 4687 Hz, 2344 Hz, 1172 Hz, 586 HzBandwidth of each line: 93.75 Hz, 46.875 Hz, 23.438 Hz, 11.74 Hz, 5.8594 Hz, 2 ...