Svantek SVAN 958A - Page 160

160
SVAN 958A User Manual
Table B.1.29. Settings for RT60 measurement
Word
number
Name / Value
Comment
0
0xnn24
[24, nn=block length]
1
Reserved
reserved
2
RT60Method
measurement method: 1 - decay, 2 - impulse
3
RT60Spectrum
2 - 1/3 OCTAVE analysis
4
Buffer step
time resolution of the logger results [ms]
5
RT60ResponseTime
response time [s]
6
TriggerLevMin
minimal level of saturation for decay method (*10 dB)
7
RT60DispSmooth
smoothing level
8
RT60NoiseMargin
noise level margin (*10 dB)
9
RT60Averaging
averaging of consecutive measurements: 0 - OFF, 1 - ON
10
RT60MeasureNo
number of averaged measurements
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Table B.1.30. Results of the RT60 measurement in one channel
Word
number
Name / Value
Comment
0
0x0025
[25, 00=block length in the next word]
1
BlockLen
block length
2
Channel
channel number - 1
3
LowestFreq
the lowest 1/3 octave frequency (*100 Hz)
4
NTer
1/3 octave analysis results number
5
NTot
TOTAL results number
6
FirstRT60Freq
number of first calculated 1/3 octave band - 1
7
LastRT60Freq
number of last calculated 1/3 octave band - 1
8
Calc(FirstRT60Freq)
flag indicates calculation results for FirstRT60Freq octave
band
9
Edt(FirstRT60Freq)
EDT result in ms
10
rt20(FirstRT60Freq)
RT 20 result in ms
11
rt30(FirstRT60Freq)
RT 30 result in ms
12
rt_user(FirstRT60Freq)
RT USER result in ms
13
cor_edit(FirstRT60Freq)
EDT correlation ratio
14
cor_rt20(FirstRT60Freq)
RT 20 correlation ratio
15
cor_rt30(FirstRT60Freq)
RT 30 correlation ratio
16
cor_rt_user(FirstRT60Freq)
RT USER correlation ratio
...
...
...
BlockLen-9
Calc[LastRT60Freq+NTot]
Flag indicates calculation results for LastRT60Freq+NTot
octave band
BlockLen-8
edt[LastRT60Freq+NTot]
EDT result in ms
BlockLen-7
rt20[LastRT60Freq+NTot]
RT 20 result in ms
BlockLen-6
rt30[LastRT60Freq+NTot]
RT 30 result in ms
BlockLen-5
rt_user[LastRT60Freq+NTot]
RT USER result in ms