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Advanced Room-Acoustics Decay Analysis

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Acoustics, Information, and Communication

Part of the book series: Modern Acoustics and Signal Processing ((MASP))

Abstract

Schroeder’s integration method broke the new ground in classical architectural acoustics. Schroeder’s integration method yields sound energy decay functions from room impulse responses. For reverberation time estimation based on a parametric model, a nonlinear regression method has been proposed. The nonlinear regression method yields reverberation time estimates, insensitive to background noise and the upper limit of integration. Recent interest in acoustically coupled-volume systems has prompted new challenges in analyzing sound energy decay characteristics, which are more complicated than just single-rate decays. This chapter will demonstrate a suitable framework for this room-acoustics application using Bayesian inference and the Schroeder’s integration as the foundation of the advanced model-based energy decay analysis. Based on the Schroeder’s integration, two levels of inference, decay order selection and decay parameter estimation, are discussed in details.

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Notes

  1. 1.

    Dr. Wolfgang Ahnert was collaborative in the initial work [17, 18] by drawing this author’s attention to a paper published in the Computation Journal in 1965 dealing with minimizing a sum of squares of nonlinear functions [14].

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Acknowledgments

The author would like to dedicate this work to the memory of Manfred Robert Schroeder whose great interest in the author’s work on room-acoustic energy decay analysis has inspired him to continue this endeavor. The author is thankful to Tomislav Jasa and Jonathan Botts for their insightful discussions and for implementing the nested sampling for this work, to Jean-Dominique Polack, Dejan Ciric, and Brian Katz for their critical comments on an early version of this chapter, and to Cameron Fackler and Paul Luizard for proofreading the final version of the chapter.

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Correspondence to Ning Xiang .

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Xiang, N. (2015). Advanced Room-Acoustics Decay Analysis. In: Xiang, N., Sessler, G. (eds) Acoustics, Information, and Communication. Modern Acoustics and Signal Processing. Springer, Cham. https://doi.org/10.1007/978-3-319-05660-9_3

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