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© FANTECH
2016
Room to room Cross-Talk attenuators
shall be of the Q-Tech CT models
and shall have the acoustic performance
as scheduled. The Cross-Talk attenuators
shall be of a proven design and must
have an established history of use.
Each unit shall consist of a galvanised
sheet metal casing and be provided with
internal parallel splitters. The splitter infill
shall be a sound absorbing material as
specified by the manufacturer. The infill
material shall be covered with a gauze
scrim to prevent erosion of the fibres
then encased in galvanised perforated
sheet metal.
The infill material when tested in
accordance with AS1530, Part 3, 1989
shall have the following indices:-
Ignitability 0
Spread of flame 0
Heat evolved 0
Smoke developed 0
The contractor shall ensure that an air
tight seal is achieved around all wall
penetrations to maintain acoustic
integrity.
Where necessary additional mass
lagging shall be applied to the outside
of the attenuators to prevent flanking
transmission.
All units shall have a constant active
acoustic length irrespective of grille or
section size. Standard units shall have
an active length of 900mm and high
performance units an active length of
1800mm.
Acoustic performance specified is
quoted as transmission loss as defined
in AS1191:1985
Mastic seal
Ceiling
Type
CTS
Mastic
seal
Mastic
seal
Type
CTU
Type
CTL
Mastic
seal
Mastic
seal
Mastic
seal
Type
CTZ
Type
CTZ
Surface Mounted
Recess Mounted
Mastic
seal
Mastic
seal
Mastic
seal
Mastic
seal
Type
CTZ
Type
CTZ
Flush Mounted
Note: Airflow shown as a guide only
(can travel in either direction)
Built-in
Ceiling
Ceiling
SUGGESTED
SPECIFICATIONS
MOUNTING ARRANGEMENTS
CROSS-TALK ATTENUATORS
NOISE CONTROL PRODUCTS
H-20