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Augmentation of Noise Free Speech Recognizer using Adaptive Microphone Array

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Author(s): Mukhopadhyay Mainak | Kundu Anindya | Chakrabarty Ajay

Journal: IETE Technical Review
ISSN 0256-4602

Volume: 24;
Issue: 5;
Start page: 385;
Date: 2007;
Original page

ABSTRACT
This paper describes the design and implementation of a 5-channel microphone array that is an adaptive beamformer used for hands-free telephony in a noisy environment. The microphone signals are amplified, and then sent to an A/D converter. The microprocessor board takes the data from the 5 channels and utilizes digital signal processing to determine the direction-of-arrival of the sources and create an output which ′steers′ the microphone array to the desired look direction while trying to minimize the energy of interference sources and noise.
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