... level:30-135dB C sound level:35-135dBLinearity: 40-135dBFrequency range20Hz-12.5kHzFrequency weightingA,CDetector characteristicsLMS true ... SD,Ld,Ln,Ldn,1/1 frequency spectrumFilter characteristics1/1 frequency intervalcentre frequency: 31.5Hz,63Hz,125Hz,500Hz,1kHz ... and microcomputer communication to print measured data and frequency spectrum histogramSound calibration TL6020/6020A sound level ...