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Gypsilab is a Matlab framework which aims at simplifying the development of numerical methods that apply to the resolution of problems in multiphysics, in particular, those involving FEM or BEM simulations. The peculiarities of the framework, with a focus on its ease of use, are shown together with the methodology that have been followed for its development. Example codes that are short though representative enough are given both for FEM and BEM applications. A performance comparison with FreeFem++ is provided, and a particular emphasis is made on problems in acoustics and electromagnetics solved using the BEM and for which compressed H-matrices are used.

Today, there exists a growing number of publicly available HRTF datasets, with each set often proposing a unique variation on the spatial discretization measurement grid. These various grids, typically determined by the mechanical system employed, result in datasets which are not directly comparable or exploitable. To alleviate the limitation of incompatible grids and assist in the adaptation of measurements performed on one grid to another, facilitating the inter-exchange of HRTF sets, a fixed radius HRTF interpolation method is proposed. The approach is based on a decomposition of the sound field using spherical harmonics, allowing for a global spatial recomposition. A high spatial density HRTF was used as a test case for evaluating the interpolation method, and a series of measures are employed to quantitatively compare the quality of the interpolation as theoretical laws.

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