Larson Davis SoundAdvisor Reference Manual page 129

Module 1
FIGURE 17-1 Sound Event
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 .................................17-5
17.3 Viewing Event History Data on the Event History Tab .....................................................17-5
17.3.1 Event History Spectral Display ...........................................................................17-6
17.4 Understanding Triggering Methods .................................................................................17-7
17.4.1 Understanding Level Triggering .........................................................................17-8
17.4.2 Understanding Dynamic Triggering ...................................................................17-8
17.1 Setting Up the E ent History Measurement
SoundAdvisor Model 831C
Using Event History
T
his module shows how to pe rform a me asure me nt using Eve nt
History, a feature of option 831C-ELA. Option 831C-ELA provides event-
based logging analysis and event history data with manual or timed
storage of statistical data and measurement history.
As shown in Figure 17-1, an event occurs when the measured sound
pressure level exceeds at least one Trigger Level and persists (longer
than the Minimum Duration you define).
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:
• Ve rify that firmware option 831C-ELA has bee n installed and
enabled on your meter. For more information, see
Enabling or Disabling Optional
Step 1 Navigate to Tools
Setting Up the Event History Measurement
As shown by the Event Stop, an
event ends 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 fluctuating
at or near the trigger level.
Setup Manager.

Firmware.
14.4
17-1