Noise Reduction Using a Plane Microphone Array and a Spatiotemporal Sound Pressure Distribution Image

Kenji Ozawa, Koichiro Shiozawa, Masanori Morise, Shuichi Sakamoto

研究成果: Conference contribution

抄録

This study proposes a noise-reduction method that utilizes a plane microphone array when the target and the noise sources are in a 2-{\pi} (sr) space. Outputs from the microphones are regarded as a 3-dimensional (3D) image, and its spectrum is obtained by the 3D fast Fourier transform. Based on the feature that the spatial spectrum of a target signal concentrates on the direct current (DC) component, we can estimate the noise amplitude. By subtracting it from the observed DC amplitude, we can reduce the noise. The results of a computational experiment performed in this study indicate that the proposed method achieved a noise reduction of approximately 20 dB, which is 15 dB larger than that achieved by a conventional delay and sum beamformer.

本文言語English
ホスト出版物のタイトル2020 IEEE International Conference on Consumer Electronics - Taiwan, ICCE-Taiwan 2020
出版社Institute of Electrical and Electronics Engineers Inc.
ISBN(電子版)9781728173993
DOI
出版ステータスPublished - 2020 9月 28
外部発表はい
イベント7th IEEE International Conference on Consumer Electronics - Taiwan, ICCE-Taiwan 2020 - Taoyuan, Taiwan, Province of China
継続期間: 2020 9月 282020 9月 30

出版物シリーズ

名前2020 IEEE International Conference on Consumer Electronics - Taiwan, ICCE-Taiwan 2020

Conference

Conference7th IEEE International Conference on Consumer Electronics - Taiwan, ICCE-Taiwan 2020
国/地域Taiwan, Province of China
CityTaoyuan
Period20/9/2820/9/30

ASJC Scopus subject areas

  • コンピュータ ネットワークおよび通信
  • 人工知能
  • コンピュータ サイエンスの応用
  • 信号処理
  • 電子工学および電気工学
  • 器械工学

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