NTi Audio XL2 Sound Level Meter - Manual (Page 50)

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Sound Level Meter
Events (optional)
The event function is available with the XL2 Extended Acoustic
Pack Option. The XL2 Analyzer may be configured to record
wav-files and additional noise levels only when triggered, in-
stead of the complete measurement duration.
Advantages
Reduces the data volume acquired, thereby
Simplifying data post-processing of the complete measure- •
ment period
Saving data memory for long-term measurement applica-
•
tions.
Events
Events are triggered either automatically by sound levels above/
below a preset value or manually by external key press using
the XL2 Input Keypad.
Event Functions
The XL2 event feature offers the following functionalities:
Automated event triggered at noise levels above/below a •
preset value including setting markers for specific noise cat-
egories. Application example: Recording the noise level for
LAF > 80 dB.
Event triggered by external key press of the XL2 Input Key- •
pad. You can utilize four keys (1-4) to categorize any noise of
interest or noise to be later excluded in the post-processing.
A typical application is categorizing any annoying industrial
noise by persons living in the neighborhood.
Data Logging
The XL2 Analyzer logs the data specified in the
LOG setting for the complete measurement du-
ration into a log file. The markers and triggered
events results are added to the same log file.
The XL2 Input Keypad is available as an acces-
sory. Please see chapter Options and Accesso-
ries for details.