Larson Davis SoundAdvisor 831C Reference Manual page 128

Module 17
FIGURE 17-1 Sound Event
1.
In this module:
17.1 Setting Up the Event History Measurement .....................................................................17-1
17.2 Storing Event Data ............................................................................................................17-4
17.2.1 Using (Continuous) Daily Auto-Store With Event History .................................17-4
17.3 Viewing Event History Data on the Events Tab ................................................................17-4
17.3.1 Viewing Octave Band and Spectral Events ........................................................17-5
17.4 Setting Advanced Event Triggers ......................................................................................17-6
17.4.1 Using Running Leq as an Event Trigger .............................................................17-6
17.4.2 Using 1/1 Octave and 1/3 Octave Event Triggers ..............................................17-7
17.5 Understanding Level and Dynamic Triggering ................................................................17-8
17.5.1 Understanding Level Triggering .........................................................................17-8
17.5.2 Understanding Dynamic Triggering ...................................................................17-9
17.1 Setting Up the Event History Measurement
SoundAdvisor Model 831C
Using Event History
T
his module shows how to perform a measurement using Event History, a
feature of option 831C-ELA. This firmware upgrade provides event-based
logging analysis and event history data with manual or timed storage of
statistical data and measurement history.
This section shows how to add some or all of the following capabilities to a
measurement setup file: Trigger Levels, Event History, Event Time History, and
Alert Notifications.
Before you begin:
• Verify that firmware option 831C-ELA has been installed and enabled
on your meter. For more information, see 14.4 Enabling or Disabling
Optional Firmware.
Step 1
Navigate to Tools
Setting Up the Event History Measurement
1.
An event starts when the measured sound
pressure level exceeds at least one Trigger
Level and persists longer than the Minimum
Duration you define.
2.
An event stops when the sound level
drops 2 dB below the trigger level. This 2 dB
hysteresis is to avoid the creation of multiple
exceedances when the sound level is fluctuat-
2.
ing at or near the trigger level.
3
Setup Manager.

17-1