59
POST SILENCE
-- sets the time between sweeps. The choices are
1 sec
,
2 sec
,
4 sec
,
or
8 sec
. The default of one second is appropriate for most environments; longer gaps should
be used for reverberant environments so that the gap is longer than the decay time and a
reverberation tail does not affect the subsequent measurement.
PRIR diagnostics
The PRIR diagnostic screens are controlled by
PRIR INFO
. Press
MENU-SPK
; the screen says:
>SAVE AT END:YES
LOOK ANGLES:AZI
EXCITATION MENU
SPEAKER MODE MENU
Choose
SPEAKER MODE MENU
, and the screen says:
>SPEAKER MODE:ALL
LF ROLL-OFF:NONE
PRIR INFO:ON
If
PRIR INFO
is
ON
, the Realiser will display two diagnostic screens after a PRIR measurement is
run and before it is saved. If
OFF
, the diagnostics are not shown.
The first diagnostic screen shows the approximate signal-to-noise ratio of each impulse response in the
PRIR data set. The data is arranged in order from channel 1 to channel 8, and each channel shows the
left-ear right-ear data pair for the measurements taken at the three head positions.
For example:
89 78 67 78 88 87
89 88 78 45 43 54
98 86 68 77 89 78
xx xx xx xx xx xx
This is interpreted as:
Channel 1 = 89 78 67 Channel 2 = 78 88 87
Channel 3 = 89 88 78 Channel 4 = 45 43 54
Channel 5 = 98 86 68 Channel 6 = 77 89 78
Channel 7 = xx xx xx Channel 8 = xx xx xx
The physical speaker to which each channel number refers depends on the actual speaker
configuration. In this example, the channels are at the default assignments and it is a 5.1 system, so
channels 7 and 8 were not measured.
Within channel 1 (the left speaker), the three sets of left-ear + right-ear measurements are, 89, 78 and
67.
89 = left-ear/right-ear looking centre
78 = left-ear/right-ear looking left
67 = left-ear/right-ear looking right
“89” represents two values: 8 means that the signal-to-noise ratio for the left-ear signal looking centre
is between 80 dB and 90 dB; 9 means that the signal-to-noise ratio for the right-ear signal looking
centre is greater than 90 dB.
