LOUD: A 1020 node Microphone Array and Acoustic Beamformer

Abstract

Recording speech and other sound is difficult in environments with a large amount of noise and/or crosstalk. In these environments, array microphones are needed in order to obtain a clean recording of desired speech. In this work, we have designed, implemented, and tested LOUD,a 1020-node microphone array. To the best of our knowledge and as documented by Guinness World Records [6], this is currently the largest microphone array in the world. We have implemented an acoustic beamforming algorithm for sound source amplification in a noisy environment, and have obtained preliminary results demonstrating the efficacy of the array. From one to 1020 microphones, we have shown a 13.7dB increase in peak SNR for a representative utterance, an 87.2 drop in word error rate (WER) with interferer present, and an 91.3 drop in WER without an interferer.

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Document Details

Document Type
Technical Report
Publication Date
Jul 12, 2007
Accession Number
AD1020161

Entities

People

  • Anant Agarwal
  • Eugene Weinstein
  • James Glass
  • Kenneth Steele

Organizations

  • Courant Institute of Mathematical Sciences, NYU

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Propagation
  • Acoustic Signals
  • Acoustics
  • Algorithms
  • Architectural Acoustics
  • Arrays
  • Artificial Intelligence
  • Australia
  • Automated Speech Recognition
  • Computer Science
  • Cross Correlation
  • Microphones
  • Parallel Computing
  • Parallel Processing
  • Signal Processing
  • Signal Processing Software

Readers

  • Acoustics.
  • Phased Array Antenna Design.
  • Systems Analysis and Design