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7. APPENDIX B: Reverberation Time Module
The module of reverberation time measurement (TR) of the SC-30 Sound Level Meter
allows:
•
The simultaneously measurement of the reverberation time T
20
and T
30
by the interrupted
noise method for the octave bands of 63, 125, 250, 500, 1000, 2000, and 4000 Hz .
•
The automatic detection of the decay curve and its slope estimation through a least
square approximation.
•
The possibility of storing the results in memory: Values of T
20
, T
30
and decay curves, for all
octave bands.
The module of measurement of the RT is not included with the SC-30. It is an optional
module and it can be acquired when buying the SC-30 or later. To incorporate it, you just
have to contact your official
distributor and supply him the serial number of your
sound level meter. In a few days you will receive a CD with the activation program.
7.1 Activation of the Reverberation Time Module
NOTE: Once a module has been activated, it cannot be deactivated.
To activate the reverberation time module (RT):
•
Insert in the CD-ROM drive the CD that you have received. The activation program ‘SC-30
RT module Activator’ will be automatically executed. If not, you should execute the
SETUP.EXE program in the CD-ROM drive.
•
Follow the steps shown in the screen.
To verify that your SLM already has the RT module.
Verify that the sound level meter it is switched on and stopped ( ), press the key
sequentially until the new mode appears. It can be identified by the title that appears in the
screen when changing the mode “REVERBERATION TIME 1/1” or by the indicator shown in
the upper right part of the screen
.
7.2 Using the keyboard
SC-30 REVERBERATION TIME KEYS
Key to begin or terminate a measurement of reverberation
time
Key for confirming the steps of the process of RT
measurement
Key to change the mode, when the SC-30 is