Far-field criterion for spherical microphone arrays and directional sources

Hai Morgenstern, Boaz Rafaely

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

4 Scopus citations

Abstract

A planar wavefront assumption facilitates significant simplifications in microphone array processing algorithms because information on the distance of the source is not required. This assumption was studied and formulated for spherical microphone arrays and point sources, but has not been studied yet for directional sources, which represent realistic sources such as musical instruments. A far-field criterion for directional sources is proposed in this paper, and the accuracy of a plane-wave approximation at a spherical microphone array is shown to depend on parameters of the acoustic configuration, such as the distance between the source and the microphone array and the source directivity.

Original languageEnglish
Title of host publication2014 4th Joint Workshop on Hands-Free Speech Communication and Microphone Arrays, HSCMA 2014
PublisherIEEE Computer Society
Pages42-46
Number of pages5
ISBN (Print)9781479931095
DOIs
StatePublished - 1 Jan 2014
Event2014 4th Joint Workshop on Hands-Free Speech Communication and Microphone Arrays, HSCMA 2014 - Villers-les-Nancy, France
Duration: 12 May 201414 May 2014

Publication series

Name2014 4th Joint Workshop on Hands-Free Speech Communication and Microphone Arrays, HSCMA 2014

Conference

Conference2014 4th Joint Workshop on Hands-Free Speech Communication and Microphone Arrays, HSCMA 2014
Country/TerritoryFrance
CityVillers-les-Nancy
Period12/05/1414/05/14

Keywords

  • Loudspeaker Arrays
  • MIMO
  • Microphone Arrays
  • Spherical Harmonics

ASJC Scopus subject areas

  • Computer Networks and Communications

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