... kHz,6 kHz, 3 kHz, 1.5 kHz.Upper Limit of Analysis Frequency: 18.75 kHz, 9375 Hz, 4687 Hz, 2344 Hz ... Hz, 11.74 Hz, 5.8594 Hz, 2.9297 HzAverage Method: index and linearityMeasuring Parameters: Lxyp, Lxyi, Lxeq,1s, Lxeq,T ... )1. Function: Reverberation time, EDT measurement by integrated impulse response method.2. Fulfils Standard: ISO 33823. Measuring Parameters: T20, T30, EDT4 ...