A nested microphone array for broadband audio signal processing

Author

Moazzen, I. ; Harrison, S. ; Agathoklis, P. ; Driessen, Peter

Author_Institution

Dept. of ECE, Univ. of Victoria, Victoria, BC, Canada

fYear

2013

fDate

27-29 Aug. 2013

Firstpage

377

Lastpage

382

Abstract

The application of a recently developed broadband beamformer to distinguish audio signals received from different directions is experimentally tested. The beamformer combines spatial and temporal subsampling using a nested array and multirate techniques which leads to the same region of support in the frequency domain for all subbands. This allows using the same beamformer for all subbands. The experimental set-up is presented and the recorded signals are analyzed. Results indicate that the proposed approach can be used to distinguish plane waves propagating with different direction of arrivals.

Keywords

array signal processing; audio signal processing; direction-of-arrival estimation; frequency-domain analysis; microphone arrays; broadband audio signal processing; broadband beamformer; direction-of-arrivals; frequency domain; multirate technique; nested array; nested microphone array; plane wave propagation; recorded signals; spatial subsampling; temporal subsampling; Arrays; Broadband communication; Fourier transforms; Frequency-domain analysis; Loudspeakers; Microphones; Narrowband;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Computers and Signal Processing (PACRIM), 2013 IEEE Pacific Rim Conference on

Conference_Location

Victoria, BC

ISSN

1555-5798

Type

conf

DOI

10.1109/PACRIM.2013.6625506

Filename

6625506