Manual

Page 11
Use in larger spaces
Another example for Professional use is within large spaces, such as Lecture Theatres or Cinemas. Given
sound travels much slower than light, in larger spaces setting the synchronisation delay at the screen
could mean it is out for those in some areas of the space. The optimal would be to take readings when
sitting in a central listening position. Depending on the ambient environment doing this may not result
in accurate readings. Combine taking accurate readings with the problem that a central position is also
unlikely to have a speaker close by, things get tricky to determine the optimal adjustments needed.
To get around this problem, a speaker distance can be input which would result in the readings taken
being adjusted for the time it would take the sound to travel the distance input (well, for sound
travelling at 21
o
c at sea level).
For example, in a lecture theatre the central seating position is 5m from the nearest speaker and it’s
much easier to take measurements at the front of house close to one of the main speakers. When
measurements are taken an adjustment would be required to cater for the time it takes the sound to
travel the 5m to the central seating position. However, by setting a speaker distance of 5m the
measurements taken and statistics calculated are automatically adjusted to take account of the time
for sound to travel the 5m to the seating position.
When a distance is input (via the Speaker Dist Menu Item), all measurements taken with a
speaker distance set are tagged with a to indicate the setting is active.
Larger spaces may also have longer reverberation times, this can lead to false detections when the beep
from a test file decays slower than Sync-One2 takes to re-arm for the next reading. This time is called
the Mask Time and defaults to 150ms, however you can increase this in steps up to 900ms.
To help spot if this may the case, the shown when a successful measurement is taken will only
clear once the Mask Time expires.
Other Adjustments
The default setting is to have the Audio and Visual sensors running at their maximum sensitivity, which
should be fine in most environments as the unit self-calibrates to account for ambient conditions.
However, should false readings continue to be taken, then a lower trigger levels is probably required.
Five levels are available, independently set for the audio and visual sensor.