近接3ch観測の差分信号を用いた実用的な雑音低減を伴う音響測距

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2022/07/01

タイトル(英語): Acoustic Distance Measurement with Practical Ambient Noise Reduction Using Difference Signals among Adjacent 3ch Observations

著者名: 山門　樹（近畿大学 生物理工学部），篠原　寿広（近畿大学 生物理工学部），上保　徹志（近畿大学 生物理工学部），中迫　昇（近畿大学 生物理工学部）

著者名(英語): Itsuki Yamakado (Faculty of Biology-Oriented Sc. & Tech., Kindai University), Toshihiro Shinohara (Faculty of Biology-Oriented Sc. & Tech., Kindai University), Tetsuji Uebo (Faculty of Biology-Oriented Sc. & Tech., Kindai University), Noboru Nakasako (Faculty of Biology-Oriented Sc. & Tech., Kindai University)

キーワード: 音響測距，近接3ch観測，距離スペクトル，実用的な雑音低減，クロススペクトル　　acoustic distance measurement，adjacent 3ch observations，range spectrum，practical noise reduction，crossspectrum

要約(英語): The acoustic distance measurement (ADM) method based on phase interference between transmitted and reflected signal has been proposed as a method to accurately measure the distance. However, since its performance is deteriorated by ambient noise. In the previous study, complex ICA(Independent Component Analysis) was applied using adjacent 3ch microphone to reduce the noise. Although ICA achieves high performance for the noise reduction, it is not too practical method because of its high computational cost. This paper describes a practical method to reduce ambient noise in the ADM using adjacent 3ch observations. Concretely, the noise component is reduced by generating two difference signals among three signals of 3ch observations in the noisy environment. Then, the ADM using the crossspectrum method is applied to them. The difference signals can be obtained with a small computational cost. The validity of the proposed method is confirmed in the actual room under the condition where the SNR ratio is -10dB. As a result, the SNR is improved to 10.5 dB, demonstrating the validity of the proposed method.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.142 No.7 （2022） 特集：2021年電子・情報・システム部門大会

本誌掲載ページ: 752-758 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/142/7/142_752/_article/-char/ja/