NTi Audio Acoustilyzer AL1 - Manual (Page 34)

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Example of an SPL/LEQ log visualized with Microsoft Excel
(LCpeak only)
OVER_dt A “1” indicates an overload during the log interval ∆t (thus all
values tend to be too low).
OVER_Hold A “1” indicates an overload during the measurement period.
UNDER_dt A “1” indicates an underload during the measurement period
(thus all values tend to be too high).
Prepare Logging
Select LOGGING from the Memory Menu.
This will bring up the Logger Setup Screen:
Setting of recording time
The maximum recording time (END) of the
sound pressure level logging depends on
the remaining memory and the selected
test interval ( ∆t ). The logger may record
a maximum of about 580 points over a
custom defined time. The test interval ( ∆t )
and the total logging time can be defined by
the user in the format hh:mm:ss.