... dB10Frequency Weighting.Parallel (simultaneous) A, C, Z. Realized by digital filtering11Time WeightingParallel F, S, I, Peak C+, Peak C-12A/D Bits24 bits13Level Linearity ... LAFmax, LAFmin, LAFeqT, LASeqT, LAIeqTNote: X is A, C, Z and Y is F, S, I18Main Parameters of Airport Noise MeasLEPN,Td ... is center frequency; X is frequency weighting A, C, Z. Y is time weighting F, S, I23Real-time 1/1 OCT spectrum ...