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Investigation of Electric Discharge Sound in Atmospheric Pressure Plasma Using Optical Wave Microphone

  • Toshiyuki Nakamiya EMAIL logo , Yoichiro Iwasaki , Fumiaki Mitsugi , Ryosuke Kozai , Tomoaki Ikegami , Yoshito Sonoda and Ryoichi Tsuda
Published/Copyright: November 30, 2016
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Abstract

The light diffraction technique, which we call the “Optical Wave Microphone (OWM)” technique, is an effective sensing method to detect the sound and is flexible for practical uses as it involves only a simple optical lens system. This technique is also very useful to detect the sound wave without disturbing the sound field. Moreover, OWM can be used for sound field visualization by computerized tomography (CT) because the ultrasmall modulation by the sound field is integrated along the laser beam path. The characteristics of the coplanar DBD (Dielectric Barrier Discharge) operated in air is investigated. Applied voltage, current and the electrical discharge sound of coplanar DBD are measured, and examined the relationship between the micro discharge and the acoustic properties. We expect that understanding of acoustic properties gives more details of electric discharges. These are the first experiments to verify the feasibility of the OWM-CT method for the visualization of the sound field of DBD discharge.

Received: 2010-10-10
Revised: 2010-11-29
Accepted: 2010-11-30
Published Online: 2016-11-30
Published in Print: 2011-1-1

© 2016 by Walter de Gruyter Berlin/Boston

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