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Convention Paper

Gradient Microphone Design using Miniature Microphone Arrays

Authors: Backman, Juha

AES Convention 121 · Paper 6878 · October 2006

Abstract

The paper describes a method of using a dense array of miniature microphones (e.g. MEMS or miniature electret) to yield precise one-point multi-channel gradient microphones. The signals obtained from individual microphones in the array are used to obtain an estimate for the zeroth, first-, and second-order components of the gradient of the sound field at the center of the array. (Higher orders of the gradient tend to be too noisy for actual sound recording purposes.) These can be used to form stereo or multi-channel signals with adjustable polar patterns for recording purposes.

Details

Published in
AES Convention 121
AES Convention
121
Paper number
6878
Publication date
October 6, 2006
Session subject
Instrumentation and Measurement
Affiliation
Nokia Corporation (See document for exact affiliation information.)
Type
Convention Paper