... slow time weighting 3.30 years experience TL6288B noise frequency channel analyzer / analysis meter1. integration, noise statistics, noise ... CD, fan cover, horologe screwdriver, briefcase Modal TL6288BMeasuring range A sound level:30-135dB C sound level:35-135dBLinearity ... Lmax,SD,Ld,Ln,Ldn,1/1 frequency spectrumFilter characteristics1/1 frequency intervalcentre frequency: 31.5Hz,63Hz,125Hz,500Hz,1kHz ...