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IRIS_EN
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Catalog excerpts

IRIS_EN - 1

3D acoustic impulse response - measurement system The IRIS room acoustics measurement system, developed by Marshall Day Acoustics, is an integrated hardware and software tool for capturing and analysing room impulse responses in 3D. A compact tetrahedral microphone array is used to capture the sound data which is analysed immediately by powerful and user friendly software. IRIS plot • The 3D impulse response data is visualised as an IRIS plot, a colour coded representation of incoming sound rays • Length indicates relative sound intensity level, angle is the ray direction, and colour represents time of arrival • 3D rotation and zoom • Dynamic range and time resolution adjustment • Specific angle and level information for individual rays • Broadband and octave band filtered views Simplified measurement process • Integrated software and hardware measurement system • Reliable, easy to use and efficient • Ideally suited to time-critical measuring environments • Traditional omni-directional waveform view • Interaction between the IRIS plot and waveform view • Automatic detection of onset time with manual adjustment Room acoustic parameters • Standard room acoustic parameters are calculated according to ISO 3382-1:2009 • Results are displayed in graphs and tables

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IRIS_EN - 2

See what you have been hearing The IRIS plot can be used to relate sound rays to physical features of the room, observe the directional distribution of early and late sound energy, and identify surfaces causing problematic rays. The graphical nature of the IRIS plot enables easy comparison between different seats in a room. Numerical magnitude, direction and time information may be obtained for a comprehensive analysis of individual rays. A standard impulse response waveform is provided, and the timing of individual sound rays from the IRIS plot may be identified in this view. Elegant...

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