... which is integrated with A & C frequency weighting and can automatically meter equivalent sequent Leq, ... . Frequency Range: 20Hz~12.5kHz4. Frequency Weighting: A, C5.Time Weighting: F(Fast), S(Slow)6.Auto- Measuring ... : Leq,LAE,DL,Lmax,Ldn,Ld,Ln.7.Measuring Time ... 1000 groups in total, 64 groups of 24h time data10. Interface: HS5618A transmits the data to ...