paper - Odeon

T(30) (s)
EDT (s)
The T 30 value in Figure 10 shows a standard deviation of 0,02 seconds (0.2 JND) at 1000 Hz,
increasing to 0.09 seconds at 125 Hz so it only varies little with position and should be easy to
reproduce even if position is not exact. This agrees with the idea that T 30 should be a global
value that relates to the room not to a local position. All other parameters do show larger
deviations and with some increases in deviations towards lower frequencies. The standard
deviation for the other parameters are however not as big as one may think when visually
inspecting the graphs. At 1000 Hz none of parameters have a standard deviation larger than 0.7
when normalized to Just Noticeable Differences (JND) and even at 125 Hz all parameters
except SPL (the G value obtained with a source power of 31 dB) have a standard deviation less
than 1.2 JND’s.
Statistics
Active receivers: 5,10,11,12,13,14,15
2
1,8
1,6
1,4
1,2
1
gfedcb
gfedcb
gfedcb
gfedcb
gfedcb
gfedcb
gfedcb
gfedcb
Simulated Avr.
Simulated Min
Simulated Max
Simulated Std. dev.
Measured Avr.
Measured Min
Measured Max
Measured Std. dev.
0,8
0,6
0,4
0,2
0
125 250 500 1000 2000 4000
Frequency
Odeon©1985-2013 Licensed to: Odeon
Figure 9: Uncertainty of position. Statistics on early decay time, EDT.
Statistics
Active receivers: 5,10,11,12,13,14,15
1,9
1,8
1,7
1,6
1,5
1,4
1,3
1,2
1,1
1
0,9
0,8
0,7
0,6
0,5
0,4
0,3
0,2
0,1
gfedcb
gfedcb
gfedcb
gfedcb
gfedcb
gfedcb
gfedcb
gfedcb
Simulated Avr.
Simulated Min
Simulated Max
Simulated Std. dev.
Measured Avr.
Measured Min
Measured Max
Measured Std. dev.
125 250 500 1000 2000 4000
Frequency
Odeon©1985-2013 Licensed to: Odeon
Figure 10: Uncertainty of position. Statistics on reverberation time, T 30 .
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