15-22 Customizing Measurements Model 831 Manual
RT-60 Settings
FIGURE 15-30 RT-60 Settings: Impulse Method
Method can be either Impulse or Interrupted Noise.
Trigger Source allows the user to select which filter output
to use as the trigger source to when making a measurement
and can be:
The Trigger Source will also be
limited to be between the Lowest and
Highest filters (inclusive) as set on
the General Tab shown in FIGURE
15-29.
•Z-weighted
• Mid-Band: using the energy from the filters between 500
Hz and 2 kHz
• 1/1 or 1/3 octave filters, based on the bandwidth selected
Trigger Level is the signal level at which a reverberation
time measurement is triggered. When using the Impulse
method, data acquisition is triggered when the rising sound
level exceeds the configured Trigger Level. When using the
Interrupted Noise method, data acquisition is triggered when
the decaying sound level drops to 5 dB below the configured
Trigger Level.
Decays indicates the number of successive reverberation
time measurements to take at a location. Once the
measurement is started by pressing 9, the Model 831 will
Select Bandwidth
See ‘RT-60 Advanced
Menu” on page 13-20
Select Impulse or
Interrupted Noise
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