Norsonic nor140, Instructional Manual, Page: 63 / 220

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Norsonic Nor140
Instruction Manual
Moving Leq
A useful addition to the measurement capacity of the
Nor140 is to be able to follow the noise level over a
certain window in time after a certain threshold level
has been reached. This may eg. be an event that
where there are restrictions to the noise level for a
particular activity, for example a rock concert for
which the Leq and Max levels shall be monitored and
reported. For this purpose we have introduced a term
we call “Moving Leq”. In the Nor140 we have added
this to the other measurement parameters, so it is done
in parallel. We also extended this to include 2 separate
user defined periods with each having their separate
threshold levels, which means you can follow 2
separate events simultaneously.
To set up the parameters, go to the setup and select
the function:
You are then prompted to key in the duration and
threshold level for Period 1 and if needed also for Pe-
riod 2. Either select to follow the A-weighted levels or
alternatively the Z (or C)-weighted levels
PS! The Moving Leq function is available
for instruments equipped with level vs. time
- option 6 as a minimum