Passive hybrid subtractive beamformer for near-field sound sources

• Mizumachi Mitsunori

  ATR Spoken Language Translation Research Laboratories

• Nakamura Satoshi

  ATR Spoken Language Translation Research Laboratories

Abstract

This paper describes the problem caused by near-field sound sources. Formerly, the authors proposed a 2-ch passive subtractive beamformer with a single sharp notch for noise reduction. It is obvious that the single sharp notch is insufficient for dealing with near-field, non-point sound sources. To solve this problem, this paper presents the hybrid subtractive beamformer that is realized as a cascade connection of single subtractive beamformers. The number of connections depends on frequency to minimize the negative effect caused by spatial aliasing when an objective signal is assumed as a wide-band speech signal. The experimental results verifies that the hybrid beamformer has an advantage in reducing signal distortion over the original single subtractive beamformer.

Journal

• Acoustical Science and Technology

  Acoustical Science and Technology 26 (6), 495-501, 2005

  ACOUSTICAL SOCIETY OF JAPAN

Keywords

• Near-field sound source
• Non-point sound source
• Passive subtractive beamformer
• Hybrid connection

Details

• CRID: 1390282680067408512
• NII Article ID: 110003143600
• NII Book ID: AA11501808
• DOI: 10.1250/ast.26.495
• ISSN: 13475177
• ISSN: 03694232
• ISSN: 13463969
• NDL BIB ID: 7492901
• Web Site: http://id.ndl.go.jp/bib/7492901
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7492901
• Web Site: http://www.jstage.jst.go.jp/article/ast/26/6/26_6_495/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10572818
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • NDL-Digital
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed