118
SVAN 979 User Manual
The
Method
parameter allows you to
choose the method for
RT60
calculations:
Decay
or
Impulse
. Both methods are
described in Appendix E.
►
The
Octave
parameter defines for which
bands (
1/1
or
1/3
) the
RT60
analysis will be
performed.
=>
The
Freq. Range
parameter defines the
frequency range for 1/1 or 1/3-octave
calculations:
-
for 1/1-octave
: 63Hz-4kHz
(7 bands) or
63Hz-16kHz
(9 bands).
-
for 1/3-octave:
50Hz-5kHz
(21 bands) or
50Hz-20kHz
(27 bands).
=>
The
Recording Time
parameter defines the recording time of the measurement
data (sound pressure level decay curve). Data registration starts in the moment
of the trigger condition appearance. Recording time can be set in the range
1
÷
30 s
.
The
Time Step
parameter defines the time-step of data registration (sound
pressure level) in the file. The parameter value can be selected from the set:
2
,
5
,
10
,
20
,
50
,
100 ms
.
The
Smoothing
position allows you to set the number of samples, which should
be taken into consideration by the smoothing algorithm. The higher is this
number the smoother is a graph. The parameter can be set in the range
0
÷
15
(default value is
3
).
Note:
this parameter influences the reverberation time results.
The
Internal Signal
position switches on
generation of the pink noise to feed the
noise source in the
Decay
method. The
signal is transmitted to the pin 1 of the
I/O
connector.
In this case you should set the
Amplitude
of
this noise.
►
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