Noise Spectrum
The XL3 determines the frequency spectrum with a Class 1 filter bank in octave or one-third octave resolution between 6.3 Hz and 20 kHz. The minimum, maximum and average sound pressure levels of all frequency bands are measured in parallel. The frequency axis can be freely zoomed and scrolled to e.g. 125 Hz – 8 kHz for appliance noise investigations. The summed level of the selected frequency range is shown in the spectrum view at the same time.
Features
- Class 1 according to IEC 61260 and ANSI S1.11 with filter base 10
- Octave band: 8 Hz – 16 kHz, one-third-octave band: 6.3 Hz – 20 kHz
- Leq, Lmax, Lmin with frequency weighting A, C, Z
- Time weighting: Fast, slow
- Percentile statistics for Lxy (x= A, C or Z, y= F or S): 1 – 99% (optional)