Software for measurement and analysis of impulse responses

IRIS solo is a software for measurement and analysis of room impulse responses according to DIN EN ISO 3382 (parts 1, 2 and 3). IRIS solo is available as a stand-alone software solution (i.e. without hardware) and is developed by Marshall Day Acoustics.


  • Measurement of room impulse responses without additional hardware (e.g. with built-in sound card)
  • Import of single channel impulse responses
  • Automatic evaluation of impulse response and room acoustic parameters according to DIN EN ISO 3382 (Parts 1 and 2)
  • Reverberation time T20/T30
  • Early decay time EDT
  • Focal time Ts
  • Clarity measure C80 and degree of clarity D50
  • Strength G, G Early, G Late & GL (incl. calibration menu)
  • Voice transmission index STI (indirect method) according to IEC 60268-16 ed. 4
  • Automatic determination of the source-receiver distance (loopback connection)
  • Easy to use and clearly structured user interface

Further information on IRIS and IRIS solo as well as some case studies can be found on the official IRIS Homepage.

Any questions?

Just give us a call or write an e-mail!