... octave digital filters Environmental noise measurement and 24 hour monitoring Reverberation time measurements Airport Noise Monitoring and data ... of Airport Noise MeasLEPN,Td,Lmax19Display Resolution0.1 dB20Real-time Analysis SpeedApprox. 47 times/s (It can ... LAeq, T, LAE, LAFeqT.24 hours monitors menu :And Ld, Ln, Ldn22Real-time spectrum analysisFulfils standards: IEC 61260 Class ...