Backscattering measurement method for sound field using pulsed laser

Kenji Ishikawa, Yasuhiro Oikawa, Yoshio Yamasaki

    研究成果: Conference contribution

    2 被引用数 (Scopus)

    抄録

    This paper presents a sound field measurement method utilizing light scattering. Since the intensity of scattered light is proportional to density of scatterers, the fluctuation of air density, which is corresponding to sound pressure, can be acquired by observing the light scattered by air particles. The light scattered in the sound field, therefore, includes the sound information in its intensity. The measurement apparatus is composed of a pulsed laser, a telescope and a photo-multiplier tube (PMT). The backscattered light is collected by the telescope and detected by the PMT. Using the pulsed laser and detecting the backscattered light enable to acquire sound quantity of an arbitrary point on optical light path by controlling signal acquisition timing. The results of the fundamental experiments confirm a validity of this method.

    本文言語English
    ホスト出版物のタイトルProceedings of Forum Acusticum
    出版社European Acoustics Association, EAA
    2014-January
    ISBN(印刷版)9788361402282
    出版ステータスPublished - 2014
    イベント7th Forum Acusticum, FA 2014 - Krakow, Poland
    継続期間: 2014 9 72014 9 12

    Other

    Other7th Forum Acusticum, FA 2014
    国/地域Poland
    CityKrakow
    Period14/9/714/9/12

    ASJC Scopus subject areas

    • 音響学および超音波学

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