High-resolution plane-wave decomposition in an auditorium using a dual-radius scanning spherical microphone array

The Journal of the Acoustical Society of America
B RafaelyLimor Eger

Abstract

The spatial and temporal distribution of early reflections in an auditorium is considered important for sound perception. Previous studies presented measurement and analysis methods based on spherical microphone arrays and plane-wave decomposition that could provide information on the direction and time of arrival of early reflections. This paper presents recent results of room acoustics analysis based on a spherical microphone array, which employs high spherical harmonics order for improved spatial resolution, and a dual-radius spherical measurement array to avoid ill-conditioning at the null frequencies of the spherical Bessel function. Spatial-temporal analysis is performed to produce directional impulse responses, while analysis based on the windowed Fourier transform is employed to detect direction of arrival of individual reflections at selected frequencies. Experimental results of sound-field analysis in a real auditorium are also presented.

References

Jan 1, 1998·Transplantation Proceedings·R CasatiL R Fassati
Nov 15, 2002·The Journal of the Acoustical Society of America·Bradford N GoverMichael R Stinson

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Citations

Jul 12, 2012·The Journal of the Acoustical Society of America·Dima Khaykin, Boaz Rafaely
Apr 17, 2012·The Journal of the Acoustical Society of America·Haohai SunWalter Kellermann
May 10, 2013·The Journal of the Acoustical Society of America·Amir AvniBoaz Rafaely
Oct 7, 2011·The Journal of the Acoustical Society of America·Tomer Peleg, Boaz Rafaely
Feb 9, 2010·The Journal of the Acoustical Society of America·Boaz Rafaely, Amir Avni
Sep 4, 2015·The Journal of the Acoustical Society of America·Yuxiang HuXiaojun Qiu
Jun 3, 2018·The Journal of the Acoustical Society of America·Gongping HuangJacob Benesty
Jun 11, 2017·The Journal of the Acoustical Society of America·Gongping HuangJingdong Chen

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