Model 831 Manual Customizing Measurements 15-25
Interrupted Noise Method
Whether using an external source or the internal source, the
Model 831 is designed to automate and simplify the process
by making measurements based upon triggers.
FIGURE 15-33 Source Settings: Interrupted Noise
Method
The signal used to energize the room can be generated by an
external sound source or using the internal noise source of
the Model 831. If using an external source, select "Off". If
using the internal noise source, select "White" or "Pink"
noise.
WARNING!
Making interrupted noise RT-60
measurements using an internal
noise source involves connecting an
amplifier or speaker system to the
AC output. Make sure to disable the
AC/DC Out preference, or turn off
your amplifier or speaker system,
before switching to the SLM mode.
Otherwise, you may damage your
amplifier or speaker system, as well
as your hearing, from the resulting
feedback.
The Model 831 outputs the noise signal via the AC output
connector. An external amplifier and speaker system is
needed to sufficiently energize a room.
Attenuation is used to reduce the output signal from the
Model 831 in instances where the level might overload the
amplifier input.
The Link to Source Display check box, when checked, will
allow the user to control these settings in real-time from the
source display.
Select White or Pink
Enter to Select
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