By Topic

Spherical microphone array with optimal aliasing cancellation

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
David Lou Alon ; Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel ; Boaz Rafaely

Spherical microphone arrays facilitate spatial analysis of sound fields. At the high frequencies the array performance is limited by spatial aliasing. In this paper we present a method to extend the bandwidth of the array through optimal aliasing cancellation. The advantage and novelty of the proposed method is that aliasing cancellation is achieved through signal processing without physically modifying configuration of the spherical microphone array. In this work we show that by taking into account the expected aliasing pattern with respect to the given array sampling scheme, a beamformer which suppresses the grating-lobes can be designed. This beamformer achieves a higher directivity-index at frequencies previously considered as out of the microphone array operating range, therefore increasing the overall frequency range of operation. A simulation example with a 32 elements spherical microphone array illustrate the proposed method.

Published in:

Electrical & Electronics Engineers in Israel (IEEEI), 2012 IEEE 27th Convention of

Date of Conference:

14-17 Nov. 2012