15-20 Customizing Measurements Model 831 Manual
• Energize the room sufficiently. It may take multiple
sound sources and measurements to characterize the
decay times over the full desired spectrum.
• Make measurements at many different source-
microphone combinations to improve the ensemble
uncertainty. See the “Accuracy Grade section on page
13-28 for more information.
• Minimize what is in the room (see ISO 3382-2:2008(E)
Section 4.1).
• ASTM E2235 requires working with a diffuse field
(random incidence) microphone. You can select the
correction FF->RI to adapt your microphone
characteristics if needed.
FIGURE 15-28 Microphone Correction
Customizing Measurements
From any of the pages on the RT-60 tab, press the Center
Softkey labeled Menu, highlight Settings, press
5 to
display the settings tabs shown below. These pages are used
to modify the measurement parameters. The active
parameter values shown represent the default values.
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