A Sparsity Measure for Echo Density Growth in General Environments

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Journal Title
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Volume Title
Conference article in proceedings
Date
2019-05-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
5
226-230
Series
ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing
Abstract
We study the detailed temporal evolution of echo density in impulse responses for applications in acoustic analysis and rendering on general environments. For this purpose, we propose a smooth sorted density measure that yields an intuitive trend of echo density growth with time. This is fitted with a general power-law model motivated from theoretical considerations. We validate the framework against theory on simple room geometries and present experiments on measured and numerically simulated impulse responses in complex scenes. Our results show that the growth power of echo density is a promising statistical parameter that shows noticeable, consistent differences between indoor and outdoor responses, meriting further study.
Description
Keywords
Density measurement, Acoustic measurements, Microsoft Windows, Reverberation, Market research, Geometry, impulse response, echo density, mixing time, outdoor acoustics, parametric models, statistical signal processing
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Citation
Tukuljac , H P , Pulkki , V , Gamper , H , Godin , K , Tashev , I J & Raghuvanshi , N 2019 , A Sparsity Measure for Echo Density Growth in General Environments . in 44th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2019; Brighton; United Kingdom; 12-17 May 2019 : Proceedings . , 8682878 , Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing , IEEE , pp. 226-230 , IEEE International Conference on Acoustics, Speech, and Signal Processing , Brighton , United Kingdom , 12/05/2019 . https://doi.org/10.1109/ICASSP.2019.8682878