New features in Iris

New! New features in Iris

IRIS currently allows consultants to accurately measure a range of acoustic parameters including many which have traditionally been very difficult to obtain, such as lateral fraction. Recently, our development team has been working behind the scenes to expanding IRIS’s toolbox even further.

The latest version is nearly complete and new features will allow users to measure intelligibility metrics.

New IRIS tools will measure:

  • speech intelligibility (STI according to IEC 60268-11 Ed. 4)
  • spatial decay rate (D2,S)
  • level of speech at 4 m from source (Lp,A,S,4m)
  • distraction distance (rd)
  • privacy distance (rp)
  • VDI 2569 room acoustic class

These new metrics are calculated according to procedures detailed in two recently published office acoustics standards, ISO 3382-3:2012 Acoustics — Measurement of room acoustic parameters — Part 3: Open plan offices and VDI 2569:2016-02-Draft Sound protection and acoustical design in offices.