Distribution of Modal Damping in Absorptive Shoebox Rooms

Maximilian Schafer*, Karolina Prawda, Rudolf Rabenstein, Sebastian J. Schlecht

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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Abstract

The image-source method is widely applied to compute room impulse responses (RIRs) of shoebox rooms with arbitrary damping. However, with increasing RIR lengths, the number of image sources grows rapidly, leading to slow computation. We propose a method to estimate the damping density of a damped shoebox room, which in turn can provide the energy decay necessary to model the stochastic late reverberation. The damping density is derived from a modal decomposition that is compliant with the ISM solution. We show that the proposed method gives a more accurate estimate of the energy decay than previous methods and can be efficiently computed regardless of the RIR lengths. While we focus on the derivation and evaluation, the main practical applications of the proposed model include, e.g., the faster synthesis of late reverb and the analysis of multi-slope decays.

Original languageEnglish
Title of host publicationProceedings of the 2023 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2023
PublisherIEEE
Number of pages5
ISBN (Electronic)979-8-3503-2372-6
DOIs
Publication statusPublished - 2023
MoE publication typeA4 Conference publication
EventIEEE Workshop on Applications of Signal Processing to Audio and Acoustics - New Paltz, United States
Duration: 22 Oct 202325 Oct 2023

Publication series

NameIEEE Workshop on Applications of Signal Processing to Audio and Acoustics
Volume2023-October
ISSN (Print)1931-1168
ISSN (Electronic)1947-1629

Workshop

WorkshopIEEE Workshop on Applications of Signal Processing to Audio and Acoustics
Abbreviated titleWASPAA
Country/TerritoryUnited States
CityNew Paltz
Period22/10/202325/10/2023

Keywords

  • Damping Density
  • Image Source Method
  • Modal Decomposition
  • Reverberation
  • Shoebox Rooms

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