Recent News
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Mini IRIS: A new simple and lightweight alternative
03 November 2023
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Sennheiser AMBEO VR Mic support in IRIS
09 September 2019
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IRIS at ICA 2019 in Aachen, Germany
07 September 2019
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Open Plan Office Module
01 August 2019
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New Online User Manual
01 August 2019
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New Release - IRIS 1.4
31 July 2019
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IRIS is put to the test
23 May 2017
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Hugh Vivian Taylor Award 2016
14 November 2016
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Release 1.1.1
30 November 2015
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New Release - IRIS 1.1
02 June 2015
IRIS on display at inter.noise 2014
20 November 2014
IRIS was on display at inter.noise 2014 in Melbourne recently, alongside other products by Marshall Day Acoustics.
Christopher Day presented a paper, "Validation of lateral fraction results in room acoustic measurements", by Daniel Protheroe and Christopher Day. This paper discussed a technique using simulated sound fields to validate lateral fraction (LF) measurement systems, including IRIS. It was found IRIS could measure LF accurate to within one JND of the calculated values.
IRIS greatly simplifies the measurement of LF compared to traditional techniques by eliminating the need to calibrate sensitivities and align multiple microphones.
Click here to download a copy of the paper.
Older NewerWhat people are saying
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Marshall Day Software is like having an acoustic laboratory in the palm of your hand.
Associate Professor Yan Xiang, Tsinghua University -
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 -
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