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

Boaz Rafaely, Ilya Balmages, Limor Eger

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

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.

Original languageEnglish
Pages (from-to)2661-2668
Number of pages8
JournalJournal of the Acoustical Society of America
Volume122
Issue number5
DOIs
StatePublished - 1 Dec 2007

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