NTi Audio XL2 Sound Level Meter - Manual (Page 234)

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Appendix
Appendix 4: Common Sound Levels
Display Application Setting
LAE Sound Exposure Level
The sound exposure level LAE is the LAeq normalized to 1 sec-
ond. The sound exposure level is measured to compare noise
events with different time durations. The LAE reports the amount
of noise from an event such as an individual aircraft fly-over.
LAE = LAeq + 10 x log (time in seconds)
->
LAeq Time-Average Sound Level or
Equivalent Continuous Sound Level
Averaged sound level over time with A frequency weighting.
-> ->
LAeq dt Level LAeq_dt “delta t” in report
Level of the preset logging interval in the LOG-menu; e.g. Log-
ging interval = 1 second, then LAeq_dt is the time averaged level
of the past 1 second.