Audio Visual Design Guidelines

Image Size, Sightlines, & Displays

47 views August 31, 2018 November 21, 2018 aetm 0

With the rapid change in display technology and resolution in recent years, our old (quite contestable!) rules of thumb are no longer a valid basis for design. In a construction world based almost entirely on standards these old rules may be rejected by architects and builders – and your own project manager may not be able to win the argument.

Our industry’s focus on developing Standards helps us all produce better, user-centred systems by defining clear ground rules which can be communicated to the design team.

Importantly, some of these standards allow customisation by each institution to best suit their users, audiences and activities.

Things to know

  • No facility owner wants an under-performing space, so engage early with all players in the design
    • Facilities Managers control your institution’s physical environment standards. If they won’t defend your interests on a construction project, nobody will, so engage early and negotiate for pragmatic design metrics.
    • People in construction management just love Find a way to communicate sightlines and ambient light with your architect in straightforward terms.
    • Ensure your physical environment standards are regularly updated to inform the concept design or design competition – you may not always know about a new project early enough to make changes.
  • Develop design standards for common teaching spaces based on sector norms but to suit your own environment. Things to consider include
    • Buildings designed before the mid-1990s just weren’t intended to have presentation technology. Think about physical space available for screens.
    • Asking for higher ceilings may impact on recurrent costs; e.g. larger room volumes require more heated/chilled air and consequently more energy is used
    • Be realistic about the number of floor boxes and conduits you request – a thin slab can only support so many holes!
  • Viewing angles
    • Horizontal viewing angle: 60° from the opposite edge of the farthest image
    • Vertical viewing angle: 30° from closest viewer’s eyeline to top of image
  • Compliant viewing area
    • The entire room may/may not be compliant with the standard – the floorspace required for 100% compliance is not always cost-effective
    • Your institution’s design standards should identify what proportion of seats must be within the compliant area for single- and multi-image rooms
    • AETM recommends [USyd benchmark provided as a pragmatic guide, suggest AETM takes a position as a group?]
      • Single image on one or more physical screens: 90% of viewers within the compliant area
      • Multiple images: 80% of viewers within the overlapping area
    • Image contrast
      • Typical learning environments fall within the Basic Decision Making category (15:1 contrast)
      • Those spaces used for detailed viewing are Analytical Viewing (50:1 contrast)

Applicable standards

ANSI/InfoComm V202.01Display Image Size for 2D Content in Audiovisual Systems
ANSI/InfoComm 3MProjected Image System Contrast Ratio




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