IRIS 3D records and visualises 3D impulse responses of rooms in an intuitive way:
Observe the directional distribution of early and late sound energy
Identify specific acoustic events in level, time and direction
Link the perception of sound to the architectural form
Interaction between the 3D ‘IRIS Plot’ and waveform view
IRIS also functions as a very capable mono impulse response measurement system. All non-3D features are available:
The room acoustic parameters from ISO 3382-1 and ISO 3382-2 are calculated in octave bands and displayed in chart and table forms:
For more details, see this page.
IRIS calculates the Speech Transmission Index (STI) according to IEC 60268-16, as well as Useful-to-Detrimental Ratios.
IRIS can come equipped with a powerful set of tools for Open Plan Office measurements, following ISO 3382-3 and VDI 2569:
These features are available in the Open Plan Office module, an add-on option to base installations of IRIS for versions 1.4 and higher.
IRIS is available with a hardware kit, which includes most of the equipment you need to conduct 3D impulse response measurements:
IRIS supports three popular first order Ambisonic microphone arrays:
Direct B-format input (with an external A-format to B-format converter) is also available.
IRIS is certified for use with the Sennheiser AMBEO VR Mic.
Marshall Day Software is like having an acoustic laboratory in the palm of your hand.Associate Professor Yan Xiang, Tsinghua University
The success of a musical performance depends on the sense of proximity of performer to listener. This sense is mediated largely by the directional properties of the reflected sound field.Sir Harold Marshall
I regard the acoustic designs of Marshall Day Acoustics to be amongst the finest and probably the most innovative in the world.Dr Anders Gade, Technical University of Denmark