Suppression of two noise sources in the same direction by instantaneous spectral subtraction

Kenji Ozawa, Kanji Watanabe, Shuichi Sakamoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This study extends our noise suppression method using a microphone array to a case where a target and two noise sources are in the same direction. Four microphones are arranged to focus the target sound and their outputs are converted into a spatio-temporal sound pressure distribution image. The two-dimensional fast Fourier transform (2D FFT) spectral components of the target are localized as direct current (DC) components along the spatial axis. Meanwhile, the 2D-FFT components of noise signals are spread into the target spectrum. Based on the spread spectrum, the DC components of the noises are estimated in every temporal frame and subtracted from the target spectrum. Computational experiment indicates that the noise is suppressed by approximately 20 dB when the two noise sources are located farther than the target source.

Original languageEnglish
Title of host publication2019 IEEE 8th Global Conference on Consumer Electronics, GCCE 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages745-746
Number of pages2
ISBN (Electronic)9781728135755
DOIs
Publication statusPublished - 2019 Oct
Event8th IEEE Global Conference on Consumer Electronics, GCCE 2019 - Osaka, Japan
Duration: 2019 Oct 152019 Oct 18

Publication series

Name2019 IEEE 8th Global Conference on Consumer Electronics, GCCE 2019

Conference

Conference8th IEEE Global Conference on Consumer Electronics, GCCE 2019
CountryJapan
CityOsaka
Period19/10/1519/10/18

Keywords

  • Spatio-temporal sound pressure distribution image
  • Spectral subtraction
  • Spherical wave
  • Two-dimensional FFT

ASJC Scopus subject areas

  • Instrumentation
  • Artificial Intelligence
  • Computer Networks and Communications
  • Computer Science Applications
  • Electrical and Electronic Engineering

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