Author (s)
Serafino Di Rosario 1, Johan Sick 2, Clement Royon 1, 2, Romain Darracq 1, Sylvain Guitton 1
Affiliation
1 LINK Acoustique, Lyon, France
2 Matlab, Lyon, France
Publication date
2023
Abstract
Measured spatial room impulse responses are a very useful tool to understand the behaviour of acoustic spaces by analysing them in both temporal and spatial domains. Different parametric methods exist to implement this analysis with the Spatial Decomposition Method (SDM) being the one employed in the presented tool. herisSon is a series of MATLAB routines that employ the mentioned SDM method and the exponential sweep sine test signal in the version presented by the author in 2010. The tool expands the previous research by providing a 3D visualisation of the IRs in the form of a hedgehog graph (the name hérisson stands for hedgehog in French) and a series of time domain interactive graphics (EDC curve, IR graph) that could be used to identify the time of arrival of reflections and their direction of arrival (DoA) with a simple click. The tool also implemented a different windowing algorithm, compared to the original SDM implementation, that suits better the 3D visualisation of the DoA of acoustic reflections and the possibility of precisely calibrate the impulse response’s level in order to provide results that could be used to analyse the Dynamic Spatial Responsiveness and other parameters with similar requirements.
Full paper
Keywords
spatial room impulse response (SRIR), spatial decomposition method (SDM), direction of arrival (DoA), acoustic reflection analysis, 3D impulse response visualization, dynamic spatial responsiveness