Golden-ratio sampling for scanning circular microphone arrays

Maor Kleider, Boaz Rafaely, Barak Weiss, Eitan Bachmat

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Circular microphone arrays have been recently studied for music recordings, beamforming, and sound-field analysis. Scanning circular arrays that use a single microphone to acquire measurements at a range of spatial sampling positions have been employed to gather an entire array data. Uniform sampling along the circle is typically used, but this scheme may not allow experimental flexibility. If, for any reason, the experiment was not completed in full, the data gathered may not be sufficient to perform the required processing. This paper presents an alternative spatial sampling scheme for scanning circular microphone arrays, which is more robust against uncertainty in the duration of the experiment. The proposed spatial sampling method is based on fixed-angle steps along the circle defined by the golden-ratio. Theoretical analysis of the golden-ratio sampling method is presented, supported by simulation examples, showing that experimental flexibility is achieved, but at the expanse of some reduction in numerical robustness. 1558-7916/$26.00

Original languageEnglish
Pages (from-to)2091-2098
Number of pages8
JournalIEEE Transactions on Audio, Speech and Language Processing
Volume18
Issue number8
DOIs
StatePublished - 17 Sep 2010

Keywords

  • Circular microphone array
  • Condition number
  • Golden-ratio
  • Irrational sampling
  • Scanning array
  • Sound field sampling

ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

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