Characteristics of Multiple-reflection Laser Microphone for Spherical Sound wave Detection

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: 2021/04/01

タイトル(英語): Characteristics of Multiple-reflection Laser Microphone for Spherical Sound wave Detection

著者名: Daisuke Mizushima (Aichi Institute of Technology), Tatsuya Ohba (Aichi Institute of Technology), Keishiro Goshima (Aichi Institute of Technology), Norio Tsuda (Aichi Institute of Technology), Jun Yamada (Aichi Institute of Technology)

著者名(英語): Daisuke Mizushima (Aichi Institute of Technology), Tatsuya Ohba (Aichi Institute of Technology), Keishiro Goshima (Aichi Institute of Technology), Norio Tsuda (Aichi Institute of Technology), Jun Yamada (Aichi Institute of Technology)

キーワード: laser microphone，self-coupling effect，spherical sound wave detection

要約(英語): The laser microphone with self-coupling effect of laser diode has the single-reflection laser beam, instead of the membranes. Because the laser beam works as the detection parts of the laser microphone, it has the wide and flat frequency response and the detectability under the high electromagnetic field. Single-reflection laser microphones are unable to detect spherical sound waves from a point source because of their low spatial resolution. In order to solve this problem, a multiple-reflection laser microphone employing a pair of mirrors has been developed. It was found that the frequency response of the multiple-reflection laser microphone is affected by the size of the detection area. The sensitivity is proportional to the number of reflections, which is seven times higher than the single-reflection laser microphone of the same spatial resolution. The multiple-reflection laser microphone can detect the spherical sound wave as same as the commercial 1/4 inch diameter condenser microphone.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.141 No.4 （2021） 特集：量子・情報・エレクトロニクス医療インタフェース

本誌掲載ページ: 586-591 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/141/4/141_586/_article/-char/ja/