Norsonic NOR150, Инструкция по эксплуатации

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53 Norsonic Nor150
Instruction Manual
Figure 11.6 - Event related terminology
Less than minimum
duration before an
event is recognised
Minimum Event
duration
Event duration
Pre-trigger, here shown with negative
delay, is configured in the recording
menu.
Minimum duration the level must stay
below lower threshold to terminate the
event
Threshold
Minimum time
between events
Figure 11.5
The Event Trigger
An event is a significant change in the sound level for
more than a minimum period of time. The amount of
level change required is predefined by you by setting
a threshold level. Hence, the purpose of the event
triggers is to start an action based on the event. A
typical action can be to start an audio recording if the
noise exceeds a certain level. The event trigger criteria
(and On/Off status) is controlled in the second frame
in the Event Trigger menu (Figure 11.5). To picture
an overview of the event trigger there is a certain
terminology associated with events – see Figure 11.6.