Optimal directional pattern design utilizing arbitrary microphone arrays: A continuous-wave approach

Symeon Delikaris-Manias, Constantinos A. Valagiannopoulos, Ville Pulkki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

A frequency-domain method is proposed for designing directional patterns from arbitrary microphone arrays employing the complex Fourier series. A target directional pattern is defined and an optimal set of sensor weights is determined in a least-squares sense, adopting a continuous-wave approach. It is based on discrete measurements with high spatial sampling ratio, which mitigates the potential aliasing affect. Fourier analysis is a common method for audio signal decomposition; however in this approach a set of criteria is employed to define the optimal number of Fourier coefficients and microphones for the decomposition of the microphone array signals at each frequency band. Furthermore, the low-frequency robustness is increased by smoothing the target patterns at those bands. The performance of the algorithm is assessed by calculating the directivity index and the sensitivity. Applications, such as synthesizing virtual microphones, beamforming, binaural and loudspeaker rendering are presented.

Original languageEnglish
Title of host publication134th Audio Engineering Society Convention 2013
Pages1-10
Number of pages10
Publication statusPublished - Sep 9 2013
Event134th Audio Engineering Society Convention 2013 - Rome, Italy
Duration: May 4 2013May 7 2013

Publication series

Name134th Audio Engineering Society Convention 2013

Other

Other134th Audio Engineering Society Convention 2013
CountryItaly
CityRome
Period5/4/135/7/13

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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    Delikaris-Manias, S., Valagiannopoulos, C. A., & Pulkki, V. (2013). Optimal directional pattern design utilizing arbitrary microphone arrays: A continuous-wave approach. In 134th Audio Engineering Society Convention 2013 (pp. 1-10). (134th Audio Engineering Society Convention 2013).