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LS LAS LCS LZS LBS
LF(SPL) LAF(SPL) LCF(SPL) LZF(SPL) LBF(SPL)
LS(SPL) LAS(SPL) LCS(SPL) LZS(SPL) LBS(SPL)
Spectrum Parameters
Spectrum parameters are the parameters upon which you can perform spectral analysis. Spectral analysis is used to
assess sounds with distinct tones.
Measure spectrum parameters (Leq, Lmax and Lmin) with frequency weightings (A, B, C, or Z) and time weightings (F
and S).
How to Set up Parameters for Spectral Analysis
1.
Open the menu.
l
From the instrument: Press briefly to open the menu.
l
From the mobile app: Tap to open the instrument menu.
2. Go to: Measurement settings > Spectrum parameters.
3. Choose the bandwidth: 1/1- or 1/3-octave.
4. Enable parameters for analysis with the desired frequency weighting.
About Bandwidth
The bandwidth of the frequency analysis. You can choose 1/1-octave or 1/3-octave, choose the one that best matches
your need for spectral details. The range of the centre frequencies are:
l 1/1-octave: 16 Hz to 8 kHz
l 1/3-octave: 12.5 Hz to 16 kHz
About Parameters
l
Leq = equivalent continuous sound level
This parameter calculates a constant level of noise spectrum with the same energy content as the varying acous-
tic noise signal being measured.
l
Lmax = maximum sound level
This parameter gives you the highest time-weighted sound level per frequency band that occurs during the
measurement time.
Set up the Instrument: Measurement Parameters
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