Analysis of Multi-Exponential and Anisotropic Sound Energy Decay (vor Ort)

* Presenting author
Day / Time: 24.03.2022, 14:00-14:20
Room: 47-05
Typ: Vortrag (strukturierte Sitzung)
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The sound field in coupled rooms or rooms with non-uniform absorptive material distributions can be considerably anisotropic. In such scenarios, the sound energy decays with more than one decay rate, thus making it practical to use a decay model that consists of multiple exponential decays and a noise term. In this work, we use a recently proposed neural-network-based approach for estimating the underlying model parameters from sound energy decay curves. Introducing a spatial filter bank allows for a directionally constrained analysis of anisotropic late reverberation, resulting in a set of multi-exponential decays with corresponding decay parameters. Our work shows that the proposed analysis framework is suitable for modelling anisotropic sound fields with multi-exponential decays and that it can be used for challenging acoustic problems, such as the denoising of spatial room impulse responses.