TANDBERG Telepresence T3 119076.02 - Manual (Page 11)

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119076.02 TELEPRESENCE T3 ROOM REQUIREMENTS 12.08
TANDBERG
Telepresence T3 ACOUSTICS REQUIREMENTS
It is essential to have a good acoustic environment for the system to provide the
true telepresence experience. This means that there should be sufficient sound
insulation to minimize noise from adjacent rooms and to ensure that confidential
information is kept within the meeting room. A good choice of acoustic materials
for the surfaces and low background noise will ensure comfort in long meetings
in addition to high speech intelligibility. You may want to contact acoustic
specialists when looking into this matter.
REQUIREMENTS IN GENERAl
All walls around the room should have a sound insulation of R’w ≥ 48 dB
(corresponding to STC 50).
The door should have a sound insulation of Rw ≥ 38 dB.
Background noise level should be less or equal to 30 dB(A). This includes both
noise from technical installations (air-conditioning in particular) and outdoor traffic
noise etc.
REQUIREMENTS SPECIfIC fOR IMMERSIVE ROOMS
Absorptive ceiling should have an absorption factor α ≥ 0.9 in the octave bands
125–4000 [Hz]. This will normally require a mineral wool ceiling of good quality.
REQUIREMENTS SPECIfIC fOR NON-IMMERSIVE ROOMS
Reverberation time (RT) should be within 0.3–0.6 [s] in the octave bands
125–4000 [Hz].
The acoustic absorption should to some extent be distributed on the walls in
addition to the ceiling to avoid flutter-echo effects from parallel walls.
The ceiling is recommended to have an absorption factor ≥ 0.9 in the octave
bands 125–4000 [Hz]. This will normally require a mineral wool ceiling of good
quality.
The walls should at least have sound absorbing fields at the side, front and back
walls corresponding to the TANDBERG Immersive Room Package. Both the
placement and area should be approximately the same. If perforated or slotted
panels are used, the opening area of the panel must be at least 20
%.
Sound absorption on walls could also be made with mineral wool wall panels,
curtains or other absorptive materials.