Model 831 Manual Overall Tab 5-19
NF30-101 Ln (Optional)
The NF30-101 Ln display appears
only when both the 1/3 octave OBA
bandwidth and NF30-101 firmware
options have been enabled.
The NF30-101 option computes the broadband Ln table
values from an energy sum of the 1/3 octave from 25 Hz to 2
kHz filters. This method of computing Ln values is used
primarily in France. Figure 5-19 shows the Ln percentiles
with the NF30-101 option enabled.
FIGURE 5-19 Ln with NF30-101
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