Chapter 3 – Measurement Set-up Menu
Measurement Set-up Menu
3–4
Brüel & Kjær2238 Mediator
User Manual
3.1.4 Setting the Statistics Parameters
The L
N
parameters show the percentage of time for a meas-
urement where the measured level exceeds the specified per-
centile level. The percentiles can be set between 1 and 99.
The percentile levels are always based on the output from
detector 1 and the associated frequency weighting.
The Statistics Window allows you to define seven percen-
tile levels which can be displayed simultaneously in the Meas-
urement Window, see Fig.3.3.
Setting the Time Weighting for Statistics
● F, S, I
The Time Wgt. field is used to select the time weighting
used for the statistics. You can select the standardised F, S
and I time weightings.
Setting the Percentile Levels
● L1 – L99
For each of the seven L
N
parameters, you can set N to a
value between 1 and 99 in steps of 1.
Statistics Results
The Enhanced module calculates the Distribution and Cumu-
lative percentages for sound levels in 0.5 dB steps. The sta-
tistics results are saved with the measurement data file and
can be printed out or transferred to a PC.
Fig.3.3 The Statistics Window
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