Circular microphone array for multi channel audio recording

Patent (2004)
Faculty
Applied Sciences (AS) (TU Delft)
Copyright: © 2004 The Author(s)
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Published Date

30-09-2004

Reuse Rights

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Source:

WO 2004084577 (A1)

Source:

http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_EP&FT=D&date=20040930&CC=WO&NR=2004084577A1&KC=A1

Faculty

Applied Sciences

Abstract

An audio system has a circular microphone array with a number of microphones arranged on a circle for receiving a sound field. A digital signal processor is provided for processing output signals from these microphones. To establish well controlled and sharp directivity patterns the audio system performs a weighted integration of the sound field on predetermined portions of the circle. The weighted integration can be performed in a pre-processor reducing the number of channels by creating a smaller number of virtual microphones or by selecting specially designed microphones