Soft-db Opus Suite SLM & 3Vib Module Manuel d'utilisateur télécharger pdf (Page 33)

7.2.3 SLM FFT Spectrum Graph

Available data

Data Type

Time Weighting

Freq Weighting

Display Type

SLM FFT Spectrum

Leq

A, C or Z

Running Average

SEL

Legend Values

Selecting versus on a FFT Spectrum graph displays either the Global value or the

Band value (associated to the cursor) on the Legend (see section 5.5.3.1, p. 16).

FFT High Pass Filter

A high pass filter is applied on the FFT spectrum to match the 1/3 Octave Spectrum frequency span,

which is 6.3 Hz to 20 kHz (see section 6.1.6, p.21).

Averaging Period

The FFT spectrum being a Leq FFT, its averaging time is the same as the Leq Averaging Time (see

section 0, p. 12).

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Soft-db Opus Suite SLM & 3Vib Module Manuel d'utilisateur Page 33