Specifications

Status: Released
Version:2.2
Document: ITS-AVS Audio Visual Standards
V2.2Issued.docx
Author: Dean McFadden
Save Date: 25/08/2014
Page 29 of 63
For portable equipment connected via VGA then the option to stretch a 4:3 to a 16:10 aspect ratio must be
offered.
2.13.11 Perceived image quality
The image displayed in each room shall exhibit clear detail in picture, colour, resolution, contrast and focus,
providing a clearly legible presentation at all nominated viewing positions. Focus shall be uniform across the
entire image.
2.13.12 Reflected and stray light
The screen shall be free of reflected and stray light when room lighting is set to presentation mode. Where
shiny objects or architectural features are located behind a translucent, transparent or otherwise transmissive
screen, the screen material and construction shall prevent the transmission of reflected light into the viewing
area.
2.13.13 Projector Screens
Dedicated projector screens are optional depending on the physical room layout and wall conditions. The AV
Consultant will detail the requirements in the design documentation. The final decision will be based on the
application of the size and viewing angles detailed above.
Where a projector screens is supplied it is to be of a motorized type in 16:10 aspect ratio unless UHD/UHD+.
Where a wall is used as a projection surface it is to be plaster board finished to “Level 5 Finish” in accordance
with AS/NZS 2589.1:2007 and finished in a flat white paint.
Where whiteboards are used as a projection surface, they are to be supplied with non-reflective surface
designed for front projection.
Other surfaces such as glass will be specified/approved on a case by case basis.
2.14 Audio Reproduction/Public Address
2.14.1 Coverage
Each sound system shall provide a sound pressure level in accordance with the installer’s calculated Needed
Acoustic Gain (NAG) and be free of discernible distortion, delay, echoes and other artifacts. All audio systems
shall provide adequate, even coverage to be clearly audible without acoustic feedback and excess volume at
any point. In spaces where wireless microphones are specified, these shall be usable without acoustic
feedback at all points in the room. Where specified, design and provide proof of conformance to
ANSI/INFOCOMM 1M-2009 “Audio Coverage uniformity in Enclosed Listener Areas”.
Any distributed loudspeaker arrays should have a coverage pattern that is uniform within ± 5 dB over the entire
seating area.
Time Alignment may need to be considered in some unique spaces, this will be highlighted in the project
specific statement of works.
2.14.2 Gain, Frequency Range and Equalization
Excessive equalisation should be avoided. Audio systems shall reproduce all frequencies within the audible
spectrum smoothly. To ensure correct operation after the sound system has been equalised and calibrated,
install tamper proof devices over any exposed knobs, switches or other controls on amplifiers and system
processing equipment. Ensure that maximum pre-set levels cannot be exceeded to produce distortion or
feedback. Provide user interface(s) such that any user may adjust system volume between off (muted) and