15-4 Making a Measurement Model 831 Manual
Step 2 Make a measurement using a starter pistol or
balloon burst (operator is in room).
Step 3 Move microphone or source position and repeat as
desired.
Interrupted Noise Method
Step 1 Recall RT60pink from the Setup Manager.
Step 2 If using the internal noise generator, connect the
AC output of the Model 831 to an amplifier/speaker system.
If using an external generator, set the RT-60 noise type to
"OFF" (see the “Customizing Measurements” on page 15-
20’) and generate noise externally.
Step 3 Make a measurement (operator exits room until
the desired number of decays is obtained). A trial
measurement may be needed to ensure the noise source is
sufficiently loud and the trigger level is exceeded.
Step 4 Move microphone or source position and repeat
the number of times needed for desired accuracy grade (see
“Accuracy Grade” on page 15-28).
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